er.. T for voice talk.. which sucks sometimes, cuz i can slip and press y, which basicaly turns off voice, but keeps me yelling into the mic :S
l is bound to the BIND OOFF PPAIIINNN! (which i get a surprising number of requests from regs for)
] is bound to csay, so i can spam my trying to be funny comments all over your screen, or, more likely, just give away the position of the last rine 'hiding out' for 'fun'
err. those are all the interesting binds.. oh, j for joining rines, and k for joining aliens.. if you noted that it's AWFULLY close to the dreaded l, well, now you know why it can happen at odd times.