Though as H says you can't rely on the rumour mill, there are some very strong rumours about reiterations of both the 7D and 5D line within the next 6 months. Just some food for thought
I have a 7D and it does me great, very flexible camera, and although the noise will obviously be more substantial than on a full frame body I still find it usable at iso 1600 and sometimes 3200.