I googled a bit earlier just to see if I was missing anything since I last posted here. Turns out there is supposedly a working ROM for the K7 tablet, not for the tablet itself but for the processor its got inside it, which is an Allwinner 10.
Anyways heres a quick guide for you if you're already rooted and such, if not check my blog posts.
GO TO THE GUIDEEEEEEE
Enjoy guys!