Hmm... I've only been to local Regionals, so I can't answer nationwide. However, here goes, in no particular order:

433: All girls, Chairman's award several times, almost won it at Atlanta this year. Good luck in 2010!

103: Always amazing engineering, great driving, fantastic team.

816: Only first met you guys in Trenton this year, I was blown away by your robot. What astounded me was that you you a kit chassis! Major props, you make me feel better that we use one too.

2753: I will always be in awe of this fantastic team. In their first year in FRC, they managed to make it all the way to Einstein. They have a fantastic robot, they are nice people, and they really make me want to achieve.

357: Your Jester Drive makes me want to use mecanums this coming year. Hope the GDC allows us to.

423: This may be my own team, but our poor record really makes me want to do better. I don't know if it's a combination of going to two Regionals for the first time ever this year, seeing all the really nice robots, or because next year is my last student year, but I really want to achieve something special in 2010. Hopefully this summer I'll be able to attain my major goals for the team next year.

I can't think of any more teams that inspire me, but good luck to all of them out there. I hope that one day my team and I can inspire younger people and teams one day as well.