This client was pretty amazing, but it wasn't brought to a point of delivering a solid experience.
psyconaut binary for Windows is available at http://www.psyc.eu/navigate/psyconaut/bin/Release/
git clone git://git.psyced.org/git/psyconaut
to git it.
psyconaut is the first .net client for PSYC. It was created because there was no real PSYC client, that was comfortably usable under Windows; and - of course - because the author wanted to learn more about this nice protocol. ,)
Full resolution of these screenshots at http://lowfidelity.biz/psyconaut/psyconaut.rar