I've looked at the Pi but I would have to buy... hmm... I just remembered I have one of these that I never use:
hum-dee-hum...

I wonder if I took all the gubbings out I could fit a Pi in there.
I haven't done any electronics since high school, but this seems like it would be a fun project.
It's a Venturer PVS123 portable dvd player. There seems to be very little information about it online, and I can't find the manual.
I measure the screen to be 115mm (4.5"), 15:8 ratio, 315x168 resolution. Seems like an odd resolution to me but the pixels line up perfectly with my ruler lines.
Now to take the innards out and see if there is enough space inside...
[edit]
Stumbled across this project:
http://www.indiegogo.com/projects/raspberry-pi-computer-lab
For less than the cost of two MacBooks, an entire school can gain access to a computer lab for the first time.
Quote: "
Using low cost components and free software a fully functioning computer laboratory of ten computers can be set up in rural Swaziland, where many students currently make do without.
Establishing a Raspberry Pi computer lab will help to address the inequality my students are faced with on global and national levels. The Rapsberry Pi computer is appropriate for this campaign because it is inexpensive, uses very little electricity, will run Linux (reducing the need for costly proprietary software), and can even expose children to programming – an increasingly valuable skill in our increasingly digital world.
"
Formerly OBese87.