Zipit wireless inc seems to be no longer supporting the Zipit Z2 as it was originally intended. in other words they no longer support the radiostations, sms, backgrounds, im etc. however this means you can now buy them cheaply from the authorized distributor. I don't know the price they are being sold at but here are the details as copied from the zipitwireless wiki.
Z2's on sale
Effective immediately, the Zipit Z2 is available for purchase at a very discounted price for those who desire repurpose the device with the Linux software available through this linux.zipitwireless.com forum and other public domain avenues.
To take advantage of this offer, please contact:
Edward Solomon President Proactive Distribution 1880 John F. Kennedy Blvd. 17th Floor Philadelphia, PA 19103-7422 (215) 568-1700 ext. 245 (215) 568-1701 (fax) esolomon.at.proactivedistribution.com
Update: #zipit irc channel user iggykoopa sent an email and received a list of the prices back. for those that are interested the prices are very good.
1- 5 for $15.00 each
5 â€“ 15 for $12.50 each
$10.00 each for any quantity above 15
Shipping is additional and billed at actual cost.