There has been no official details released about the cards so it is all meaningless speculation right now. Though i really doubt that anyone will be producing 32nm chips in Q1 of 2010, i would say Q2 at the earliest, they cant even get good 40nm yields right now and AMD has had months to improve that with the 4770.
The 5670 shouldnt need a power connector from what i understand. The 5770 will need a single one but its my beleif from what i have read that the 5670 wont. I dont think anything will come out as 32nm yet either.