I would like to point out that the socket replacing LGA1366 will be LGA2011 NOT LGA1365 as you have stated. And yes, LGA1155 will replace LGA1156.
Thats wierd. I remember reading an article a while ago on Tom's (can't seem to find it now) about the new sockets and how they have only one less pin than the previous ones. The only reason I remember it is because I was wondering if the new chips with one less pin would fit/work in the older sockets possibly with a bios update. Looks like I'm out of luck for my 1366 system. But hey, the i7 920 is still kickin ass and will be for a while.