The zaurus is now officially killed by Sharp. Some 15 months back I had bought a SL-5500 which is now accumulating dust in spite of some really thrilling software on it. This is the only main stream PDA with a true sense of open source in it. Enthusiasts ported all sorts of GPLed software including the gcc, perl, kismet etc., to this little dream machine. The SL-6000 is going to be the last PDA in the series.
Sharp though, continues to sell the Zaurus line in Japan (The clamshell design is really impressing).
Zaurus now joins the Newton and will be remembered for a long time by early adopters like me.