I started up in FIRST last year ('07), and Foley Freeze's (frc910) auto still amazes me
http://www.youtube.com/watch?v=ecZ4ghaYwTk
Granted it was an off-season event, but still the most amazing thing I've seen so far. I also enjoyed the 6 keeper auto at IRI that year:
http://www.youtube.com/watch?v=U02DOVK0mFQ