For anyone interested in a similar, slightly higher specced, hackable ex-consumer device for next to nothing: ZipIt Wireless have been clearing their old "ZipIt Z2" messenger range for some time now.
http://linux.zipitwireless.com/
ARM9 ~300Mhz, 32MB RAM, wifi, QVGA display, keypad, mainline linux kernel support, etc.
Decent sized hacking community: #zipit on freenode & sites like http://mozzwald.com/
Believe prices are as low as $18 for a single one, or $10/unit if you buy 16. We bought around 20 in a group buy at our local Hackerspace. Not quite cost of postage, but still pretty cheap.
ARM9 ~300Mhz, 32MB RAM, wifi, QVGA display, keypad, mainline linux kernel support, etc.
Decent sized hacking community: #zipit on freenode & sites like http://mozzwald.com/
Believe prices are as low as $18 for a single one, or $10/unit if you buy 16. We bought around 20 in a group buy at our local Hackerspace. Not quite cost of postage, but still pretty cheap.