Java RDF Browser/Editor Wanted

Now that I've got some RDF in a database, I'm looking
for a simple java tool that will let me browse around
it and edit it.

Does anyone have a simple java based RDF editor/browser
that sits on top of Sergey's API that they'd be willing
to share?

I'll do one myself, but its a waste of time if someone
else out there already has or is working on one.

Brian