Good links.
Although the NSX it's a Honda, still quite not as cheap to find parts / labor as you would do with Civic or even the super rare Prelude.
In almost 3 years of ownership I had only 4 major services, the rest was just normal maintenance:
Bought the car with 58K miles
@ 70K miles
• Clutch slave cylinders = $350 with Labor
• Right rear Axle = $1,400 OEM (I got lucky and found a parted 2000 NSX very low miles for $300 used) + $250 Labor
@ 75K miles
• Factory emissions extended warranty for 97 NSX's = FREE
@ 80K miles
• Clutch = $2,800 OEM Na2 + $650 Labor .. I didn't get OEM, I ended up with the ScienceofSpeed Billet Twin Carbon Clutch which was less $ and still an AWESOME clutch!
That is my experience so far, I'd say, for the miles I put, the age of the car, and THE FUN I HAVE, it's just PRICELESS!!
Others my chime in! 
Oscar
