There has been a discussion on this thread
http://www.psdn.com/library/thread.jspa?threadID=2207&tstart=0&start=45
about possible open source plugins for OEA.
The discussion is continuing here:
http://www.psdn.com/library/thread.jspa?threadID=2251&tstart=0
with a somewhat wider focus.
Seems like someone watching this forum might be interested.