I'm also hearing rumors that the desktop versions won't have an IMC. I only heard that once or twice, so I'm not sure how true that is. The rumor claims that the Q3 or Q4 for 08 will be IMC server chips only. (I think they require server memory, or even those horrible FB-Dimms) Desktop versions will hit in Q1 09, and will lack the IMC. Desktop versions with the IMC aren't supposed to hit until the second half of 09. I have no clue how true this rumor is.
Seeing as we are spreading/asking for rumors, the other one I heard is that Intel is currently having issues with yields. Rumor says the price for these chips will stay high, for quite some time unless yields go up.