hey, i used to live in central london, coz i was at uni there (didn't work much), i live just outside London right now but i am planning to move to London end of summer, depending on cash etc... Yes i have heard of fabric, haven't been though, it sounds great. Afrika Bambataa and fabio played a while ago but it was well expensive, so couldn't go. Been to quite a few clubs in london, there's loads and great venues too, going to see Weezer in July.
It's well worth a visit,
be sure to get in touch if you ever do,