It seems that the JSyncManager site had been down for couple of weeks and many people had asked for it.
You can find the JSyncManager Yahoo Group at:
http://groups.yahoo.com/group/jconduit-dev
Subcribing there you can post questions a download the files.
"The jSyncManager is alot of things, It is both an easy to use program for end-users (such as yourself)designed to provide PalmOS data synchronization on any Java-enabled platform. It is also a powerful developers toolkit, allowing programmers to write jConduits, or to employ data synchronization into their own projects."
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