http://www.thesixthaxis.com/2011/03/31/tsa-talks-to-brinks-ed-stern/
"with robust and reliable host migration for the consoles"
Host migration confirmed. Lacking this feature was basically my only major criticism of the multiplayer in Transformers: War for Cybertron when it was first released. The map packs killed it completely, but before them, the only problem was the lack of host migration. getting "host quit" messages as you're taking 1st place (because the guy you just overtook was the host, of course) was rather frustrating. Glad SD didn't fall into that trap.