Gifts for geeks under $50? T-shirts are a classic... check out the stylish (yet tres geeky) designs at Jinx, Threadless and, of course, the Tekzilla gear at the Revision3 Store! How about recharable batteries, or an 8GB SD Card for their camera or maybe a 16 GB USB Thumdrive to back everything up on? Looking for a fun USB thumbdrive? Check out Mimobot for original designs along with Star Wars, Hello Kitty and Domo drives, too! Cheap headphones? Try the Koss PortaPro for as little as $28. New gadget? Protect