frunobulax covered the potential problems from overheating pretty well. I would just add that even if you do not find any obvious problems right now, there is still a chance you will end up replacing a lot of seals and gaskets over the next couple years because they were over-stressed when it overheated. So if you start developing weird oil leaks, or need a new head gasket or something, you will know what probably caused it. There is nothing you can really do now unless you want to go through and replace all your seals and gaskets which may or may not have a problem. I'd just wait and see.. if problems start to develop, you might want to think about replacing all the rest while you are in there replacing whatever failed.
I agree w/ the guys who say to just start from scratch on the coolant flush and fill. Follow the manual (there is a copy online here) and make sure you bleed the air out. You may even need to bleed it, drive it a little and then bleed it again.
Due to the nature of the NSX mid-engine front-cooling design, it is a real chore to flush, fill and bleed the coolant. Be sure to:
Look it up in the sevice manual here: http://www.nsxprime.com/FAQ/Reference/1991_svcman/1991_svcman.htm
Read this write-up: http://www.nsxprime.com/FAQ/DIY/coolant.htm
Take your time!
Also double-check your coolant. I don't know what coolant you put in it, but the factory Honda coolant is more yellow than green-blue. If you use the wrong type of coolant you can end up with big problems down the line. And make sure you flush out ALL of whatever wrong coolant was put into the system to begin with.
BTW I see you have a vt.edu e-mail address, so I assume your car is at your parents place in VA Beach and you are at VT for school? I am in the VT area, so if you like I can lend you a service manual or show you how to bleed the coolant system on my NSX (I'm not actually going to DO it, because I just did it recently, but I'll show you the bleed points!)
