WebSphere Everyplace Micro Environment Personal Profile 1.0 for Sharp Zaurus
This is IBM's Personal Profile for Java for the Zaurus.
You can download a free trial version from Handango which is fully functional. It seems you only need to buy a licence if you wish to deploy apps on other machines.
Download from Handango
This is much more recent than other Java's for the Zaurus (apart maybe from the 6000).
Just tried it on my c-860 and it seems to work fine.