Spending most of my time behind a camera at events now means I'm always looking for good shots of team intros. In no particular order, these are some of the favorite ones I remember:
GaelForce has been doing a
Charlies Angels type thing
1100 was
ALWAYS Dancing!
Funky Monkeys did a Crazy Monkey Dance (I think I have a pic somewhere)
340 does a
Tiger Claw Attack (GRR)
3003 would
fill the glass with Hands 
145 makes
TRex Arms
Here is the
33 Jump!
Baxter Bomb Squad's Archers?
I think this is
Bacon Exploding...
And maybe
Milking the Holy Cow?
Digital Goat Horns
Air Strike's
Towel Spinning
The
Infinite Loop!
The
Uberbot's Superman
48 did some sort of
Wind Up Bernie Dance!
2168 always has something creative, last year it was
Angry Hips, this year it's
making it rain
MORT did
Gagnam Style
I think its awesome when the teams come up with something unique that is their signature for the year. It makes the event fun, and keeps the crowd (and the MC!) guessing!!
Keep up the awesome creativity!