I have found a plugin for XBMC but not 7MC. There is also a playon script but I don't use playon. For those not familiar with icefilms.info it is worth a look if you are trying to cut the cord and don't mind the legality aspect. My take is that Comcrap has been raping me long enough to not really care at this point.
Icefilms plugin for mediacenter?
Checked it out. Interesting, and some of that HD content looks pretty nice for streaming. I may need a shower after visiting that site, but I can see how that could be quite popular.
My guess would be that the legality aspect is a bit of an issue for anyone considering developing such a plugin.