[EricH]

294 and 330 have one in SoCal... They have yet to pair up in elims, but tend to face each other quite a bit. One or the other often wins the event.

'Course, 330 also has 980 and 1717 as "rivals". Any two of the three pairing up tends to make life miserable for everyone else; if they aren't paired up, it's exciting. All three teaming up, see 2008 L.A. eliminations.

However, all the "rivalries" in FIRST are quite friendly. It's quite common for rivals to pair up in eliminations, or to help each other out a lot. Not like some pro sports rivalries (Red Sox-Yankees, anyone?).