Well, if you're not tied to the chan's, there's plenty of femdom sites. They might not be super-active, but if you follow all of them, there's bound to be some shit going on somewhere. Try looking up:
orgasmdenial.com
milovana.com
inraptured.net
mistressdestiny.com
FetLife.com (basically facebook for kinksters, seems mostly into maledom BDSM, but there are femdom sub forums)
Hope some of these help.