More Geeky Halloween Costumes: Last Minute Edition

Still not sure what you will be dressing up as on Friday night? Here is a bit more inspiration: 

• The Discover Discoblog has the Top Ten Science Halloween Costumes, from a quickie squid to a recyclebot to a biohazard suit . Read part 1, part 2.
• io9 has 10 awesome SF-themed costumes you can get done by Friday. Why not show up to your Halloween party as an off-duty Battlestar Galactica personnel, or a random Stargater? Easy and fun.

I think the biohazard suit could be made doubly awesome by carrying a vial of chemiluminescent chemicals casting an eerie glow.