Here are a few tips for those who are flying to Phoenix for the event, based on my personal experience.
Flights. Phoenix Sky Harbor International Airport (PHX) is the only airport in town served by commercial airlines. Southwest and America West have hubs there, and other airlines fly there from their hubs elsewhere.
You can look up fares for all the airlines except Southwest on most travel sites, such as Orbitz, Travelocity, Expedia, etc. You have to check Southwest's website for their fares and deals. They offer specials in several ways - through their "click and save e-mails", through various sales on their website, and through their Ding! desktop tool. In my case, I had identified the flights I wanted, and saw that their lowest fare was NOT available for my outbound flight, but WAS available for my return. So I waited, and checked their website every couple of days. Today I found that the lowest fare was available for both flights, so I booked them. For fun, I tried the same reservation again just to see if I took the only seat available at that rate, and indeed I did. So if you can't get the fare you want, you might try gambling that it becomes available by holding off and checking back, rather than booking a higher fare. (Of course, it is a gamble that even the next higher fare might become unavailable.)
Rental Cars. Rental car rates at the major car agencies, available through travel sites such as those mentioned in the previous paragraph, are similar to those throughout most of the country - generally $20-35 per day, depending on car size, company, etc. If you don't need the flexibility of being able to cancel your reservation, I recommend checking Hotwire and Priceline. Both these services have a major downside, which is that you have to pay at the time that you make your reservation, and the reservation cannot be cancelled. You also can't select a specific vendor. The upside is that you can get significantly lower rates. The difference between the two is that Hotwire tells you a specific price, which you can then buy, whereas with Priceline, you set the price, which they can give you or reject.
When I checked Hotwire, I got back rates of $11.95/day for an economy car, and $12.95/day for a compact car, on a seven-day rental, and two dollars more per day on a six-day rental. So... I bid $9 per day for an economy car on a seven-day rental with Priceline, and it was rejected. I then bid $10 per day for a compact car on a seven-day rental, and it was accepted, with Budget Rent-a-Car. (Of course, taxes and fees are added to the rental, and in my case they are almost the same amount as the rental itself!)
Incidentally, I needed the rental car for personal reasons. But it's possible to participate in all of the NSXPO 2005 activities without having a car there at all; there are always plenty of empty passenger seats that other NSX owners will be happy to offer to you. So if you only need to rent a car in order to get from the airport to the hotel when you arrive, and back when you leave, you can probably do without it. You can always catch a cab, or better yet, shoot me a PM or e-mail if you are arriving/leaving at a time when I can give you a ride, and I'll be happy to do so.
Flights. Phoenix Sky Harbor International Airport (PHX) is the only airport in town served by commercial airlines. Southwest and America West have hubs there, and other airlines fly there from their hubs elsewhere.
You can look up fares for all the airlines except Southwest on most travel sites, such as Orbitz, Travelocity, Expedia, etc. You have to check Southwest's website for their fares and deals. They offer specials in several ways - through their "click and save e-mails", through various sales on their website, and through their Ding! desktop tool. In my case, I had identified the flights I wanted, and saw that their lowest fare was NOT available for my outbound flight, but WAS available for my return. So I waited, and checked their website every couple of days. Today I found that the lowest fare was available for both flights, so I booked them. For fun, I tried the same reservation again just to see if I took the only seat available at that rate, and indeed I did. So if you can't get the fare you want, you might try gambling that it becomes available by holding off and checking back, rather than booking a higher fare. (Of course, it is a gamble that even the next higher fare might become unavailable.)
Rental Cars. Rental car rates at the major car agencies, available through travel sites such as those mentioned in the previous paragraph, are similar to those throughout most of the country - generally $20-35 per day, depending on car size, company, etc. If you don't need the flexibility of being able to cancel your reservation, I recommend checking Hotwire and Priceline. Both these services have a major downside, which is that you have to pay at the time that you make your reservation, and the reservation cannot be cancelled. You also can't select a specific vendor. The upside is that you can get significantly lower rates. The difference between the two is that Hotwire tells you a specific price, which you can then buy, whereas with Priceline, you set the price, which they can give you or reject.
When I checked Hotwire, I got back rates of $11.95/day for an economy car, and $12.95/day for a compact car, on a seven-day rental, and two dollars more per day on a six-day rental. So... I bid $9 per day for an economy car on a seven-day rental with Priceline, and it was rejected. I then bid $10 per day for a compact car on a seven-day rental, and it was accepted, with Budget Rent-a-Car. (Of course, taxes and fees are added to the rental, and in my case they are almost the same amount as the rental itself!)
Incidentally, I needed the rental car for personal reasons. But it's possible to participate in all of the NSXPO 2005 activities without having a car there at all; there are always plenty of empty passenger seats that other NSX owners will be happy to offer to you. So if you only need to rent a car in order to get from the airport to the hotel when you arrive, and back when you leave, you can probably do without it. You can always catch a cab, or better yet, shoot me a PM or e-mail if you are arriving/leaving at a time when I can give you a ride, and I'll be happy to do so.
). Those were FUN!!! 
