(Although looking at that now, the cheapest board is still about $9)
I'm not saying that to downplay the RPI - the community it has around it is great, but long gone are the days of trying to get Linux running on a random arm board. And I should know, I have over 100 different arm machines at my place.
Any build that doesn't start with a multimeter, a soldering iron and a TTL->USB cable is pretty straightforward...
(A wee pang of nostagia there when I saw it mentioned)
Happy days :)
How would you go about doing that? Any guides out there for something like this?