I am very biased but my favorite is:
Code Red Robotics #639
Some other favorites:
Gompei #190 (years 1999 and before)
ThunderChickens #217
Ok ok these are just some of my favorite teams in general but they have cool names
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Systems Engineer - Kiva Systems, Woburn MA
Alumni, Former Mechanical Team Leader - Cornell University Robocup - 1999, 2000, 2002, 2003 World Champions
Founder - Team 639 - Ithaca High School / Cornell University
Alumni - Team 190 - Mass Academy / WPI