George Birbilis, one of our J# MVP's, just sent me a note to show his completed port of JAWAS to J#. You can download it here (it requires J# 2.0): http://www.mech.upatras.gr/~robgroup/agents/multi-agent/. This is a cool example of how J# can be used to port a Java application to the .NET Framework. George has completed several such projects in the past, such as his TurtleTracks port (which will be familiar if you've used LOGO).
JAWAS = Java Artificial World and Agent Societies. I haven't used it before, but there are .WMV files on George's site - looks pretty cool.