I second this recommendation. Obviously the poster has been there if they linked to it, but they also clearly have not taken advantage of it at all.
Sure, Slashdot is great, but you can sign up on DIY Drones and get much better responses from people with more experience working directly with, well, do it yourself drones.
On another note, I've been sort of working on my own UAV for a little while now. You can get lots of parts from Sparkfun, ranging from the Ardupilot to GPS's to microcontrollers that you can program yourself for a UAV.
The most important thing to consider is cost, and I would say the second is what exactly you want to get out of this project. If you just want the end result, it makes more sense to go with a prebuilt autopilot such as the Attopilot or Ardupilot, if you are doing it for the experience, it might make more sense to look at the Paparrazi project or just kind of work it out yourself. If you really want you can even build your own airframe, wireless infrastructure, and solder up all the boards yourself.
So really, it's hard to give you any advice based on what you've said so far. There are hundreds of ways that you can take the project depending on just what you want, but I would say that DIYDrones is the best place to start, the people there are pretty friendly, and if you describe just what you want, they'll definitely be able to help you out.