I got my first Raspberry Pi two days ago (there will be more!). Yesterday I put it together and installed Arch Linux ARM distro on it and configured that. I can now ssh into that bad boy and do whatever I want. The nice thing about a Pi is that it's small, no noise, and low energy consumption. I can slap a few flash drives in the 2 USB ports (or add a hub if I wanted more or connect it to network storage of some sort) and give it more storage space to be a LAMP server or some variation. For me, it'll first be my VPN server. I'd like to be able to tunnel into my network from any public wifi and know I'm secure using that wifi. My service (Sprint) sucks, but wifi is all over the place. Setting up a basic VPN isn't that hard at all. I'll probably go that route, but later I'd like to have something a bit more secure that provides stronger user verification, matches hardware, and could even use two-stage verification by sending a text message or something. I also want to set up my conky on my desktop to consume logs, because I know I'll be paranoid. Will need to figure out what sort of information to pay attention to. This is fun, regardless.
The kit only cost my $80 on Amazon. Provides Pi, case, power supply, wifi card, 8 GB sd card with choices of OS already loaded, hdmi cable, GPIO with breadboard and other goodies. I may save those things for my next build, as there's some fun things I'd like to do (connect a wire and turn your Pi into a radio transmitter; broadcast your own music that way; I'd also like to toy around with basic robotics, motors, sensors, and put this $2 solar charger I got at Goodwill to use for something.