I whipped up some Javascript that lets you choose which races you're using, how many players you have, and (optionally) how many races each player gets to choose from -- and then virtually "shuffles and deals out" your racial choices.
It's basically the same as doing it by hand, but this way you don't have to pull out the home world tiles separately, deal them out, and then try to remember which world/symbol goes with which race.
http://www.mygurps.com/TwilightImperium.html
If you use it, please let me know if you come across any glitches or issues.