Oh my God, oh my God, oh my God.
http://www.amazon.com/NOKIA-N800-Por...3?ie=UTF8&s=pc
I found my toy.
The Nokia n800
4.1-inch, 800x480 pixel touch screen, a 320MHz processor, 128MB of RAM, 256MB of Flash ROM, dual SD memory card slots, 802.11b/g WiFi, a built-in camera, Bluetooth 2.0
Obviously, it's not a UMPC, it's an internet tablet. But I am a fan of Nokia.
It runs on Linux and is
very much hackable.
It can run a freakin' bittorrent client, for Christ's sake.
And it won't cost me an arm and a leg, either.