jaPSYC is an elaborate PSYC framework in Java containing both a simple server, a chat/IM client called Psycedelic and a few other little apps like a mail notification biff tool. The code even compiles and runs, but it's not compatible with the current state of psyced. jaPSYC implements a whole lot of useful stuff though, so you may find it worthwhile to correct those few glitches.
You can browse it here.
Also to be performant by today's standards of Java™, it needs a rewrite away from threads into an event-oriented form as recently provided by java.nio. This would simplify jaPSYC a bit, as it is currently implementing its own internal eventing to avoid launching multiple threads.
the psyced applet
The applet provided with psyced does NOT implement native PSYC, because for applet purposes the full-fledged PSYC is usually over the top. It comes with a tiny enhanced text protocol merely oriented to GUI requirements. Here it is: http://www.psyc.eu/navigate/psyced/utility/veChat.java