80's Video Game T-Shirts — T-shirts with 80's video games designs... ya gotta love it, especially if you spent your childhood savings one quarter at a time. 80stees.com

 Cool Tools — A blog discussing cool tools. Doesn't sell the tools directly, but you can find lots of leads to fascinating and amazing tools here. kk.org/cooltools

 Demotivators Posters — You know those motivational posters? The kind that are so insipid you can't stand to look at them? Well you should definitely check out this Demotivators collection that parodies them, especially if your geek works in a cubicle. despair.com

 Edmund Scientific — This link goes directly to their gift idea page, but the catalog has a very wide range of science-related geek toys and gifts. scientificsonline.com

 Errorwear — T-shirts that "fuse geek culture with high fashion" by showing a wide variety of computer error messages on the front. Pretty darn geeky! errorwear.com

 EternaLight LED Flashlights — Technology Associates sell some very advanced LED flashlights that any geek should love. The flashlights have several blinking, strobe, emergency signal modes, you can adjust the brightness, etc. Definitely not just a toy. techass.com

 Hacker Stickers — Stickers for hackers, geeks, and other computer people. hackerstickers.com

 Hackerthreads — Another clothing and t-shirt store with unique hacker and geek-related shirts. hackerthreads.com

 Jinx Clothing for Gamers and Geeks — T-shirts and other clothing for geeks, with a particular slant toward gamer geeks. jinx.com

 LockPickShop — Geeks tend to love forbidden and subversive knowledge, and lock picking is that kind of knowledge. Buy videos, lock picking sets, and other lock picking accessories here. lockpickshop.com

 Macintosh Icon T-Shirts and Gear — A collection of T-Shirts with Macintosh icons on them, all by Susan Kare, the original icon designer for the old school Macs! Leads to a CafePress store, but that means you can also get the icons on mugs and mouse pads.  kare.com/shop.html

 MAKE Magazine — A subscription to MAKE Magazine may be just the think to keep your geek occupied for a whole year. makezine.com

 Panic Goods — A fantastic selection of unique T-shirts, with some geeky and some not-so-geeky, but all good. Includes the old-school Atari Adventure dragon, spinning wait icon shirt, and Katamari shirts. panic.com/goods

 SecureShirts — A small collection of T-shirts with a geeky hacker security slant. secureshirts.com

 Super-Powerful Magnets — It's so cool to get a package from United Nuclear. Be sure to check out their home page, because not only do they sell these insanely powerful magets, they also sell chunks of AeroGel, meteorites, and other stuff any science geek would absolutely love. unitednuclear.com/magnets.htm

 SuperCircuits — SuperCircuits sells surveillance equipment and professional security video gear. A huge variety of low-light cameras, infrared (IR) illuminators, CCTV systems, multi-camera DVR systems, covert video, hidden video, cables, wiring, etc. They even have the camera in a baseball cap and camera mounted in eye glasses for covert surveillance! SuperCircuits.com

 ThinkGeek — ThinkGeek is pretty much the king of the geeky toy space. Some of their stuff is a little overpriced, but they have a huge selection of toys, gadgets, coffee mugs, t-shirts that your geek friend will love. thinkgeek.com

 TinyNinjas Geeky T-Shirts — A small selection of geeky t-shirt designs, including the arrow cursor t-shirt and a WTF t-shirt. The rest of the site has some other clever t-shirt designs as well. tinyninjas.com

 Unamerican — For the anarchist rebel geek, Unamerican has a wide selection of revolutionary t-shirts, stickers, and buttons, suitable for your geek friend living underground awaiting the apocalypse..  unamerican.com