I had my Ceiva listed on eBay, but just found out the inverter is broken. So anyone who wants the unit for experimentation, it's yours if you pay shipping costs (probably about $5-$6 for US Postal Service). All you are getting is the unit itself (LCD, PCB + frame); you will need to provide about 9VDC, 350mA or so.
This is a board based on the Cirrus CL-EP7212, with an Epson LCD controller driving a 640x480 CSTN LCD, and a DAA (the thing implements a soft-modem). The unit is working fine except that the transformer on the inverter is damaged, so the LCD backlight doesn't illuminate. I would suggest pulling an inverter out of an old laptop. There is a small hacking community, and an extant Linux port for the board . You don't need JTAG to get new firmware onto the device; the CPU has inbuilt (ROM) serial bootloader.
*Please* don't request this just to add to a collection of miscellaneous junk; that's the fate it has been suffering for the last two years in my junkpile. Please only ask about it if you really want to do some learning on ARM7.