So! I did a search, and I didn't see another thread about it. Though, forgive me if I somehow didn't search for the correct terms (I figured raspberry and pi would do it. :p )
Anyway... It's a $25-$35 GNU/ARM based computer. There's a $25 one with no Ethernet and only one USB port, with 256 MiB of memory, and there's the much more recommended $35.00 version, with two USB ports, an Ethernet port, and 512 MiB of memory. Both run the same processor, an ARM6 clocked natively at 700 MhZ, but with the update clockable to 1000 Mhz without voiding the warranty.
They're fun little things; they have a pretty good GPU with the videocore4, but the XLDE isn't GPU accelerated yet, so using the desktop can feel a bit slow at times. Chromium (browser) compiles and runs well; I've found a YouTube player that works with OXMPlayer from the command line well (allowing GPU acceleration!) I use Raspbian on mine, but I'm intending to get a second SD card to play with RaspBMC.
It'll be great for retro-style console gaming, though, if you're into that. It's incredibly portable, too, especially with a 'dumb' powered USB hub (that is, it sends power without waiting for a data response) so that you can power it through that. Get a portable PAL/NTSF/Brazil PAL portable television with component or HDMI video, and you're good to go! I took some pictures with my currently crowded desk (I updated my Magic the Gathering deck) of what I use for it, but unfortunately.... I can't find my camera cable right now. I did, however, find my second SDCard.. The one I was going to use for standard operation. So I'll have to put the updated image on that, and put RaspBMC on the faster one. Or maybe I'll just do it the other way around. I'll have to do some tests to see if the Class 4 vs Class 10 really makes a difference in this case.
I can suggest components, know places that deliver fairly quickly (and restock fairly quickly) in the United States at least; overseas (from the United States) suppliers (even though it's manufactured in UK/China) seem to always be out of stock, though.
I have for mine:
A compact Wireless Keyboard (cost me about 6.99), a portable USB optical mouse (About 4.99), a portable ~7 inch (~17.75 cm) LCD TV, and a 16GB class 10 and a 16GB Class 4 SD card. Right now I'm sharing my desktop's internet connection with it; I really want to get a wireless adapter for it, but that'll require a USB hub... so I need to find a dumb one, like I said, to keep it requiring one plug when possible.
Pics when I can. It's a neat little mini workstation/youtube viewer, since I'm still in the process of setting it up. I might get one of the 512 MiB ones, and perhaps turn this into a private webserver/cheap network attached storage/HTPC (excellent at streaming HDMI) or something. Maybe even a car computer! It's cool.
Anyway, link:
http://www.raspberrypi.org/