We plan to begin migrating accounts to Office 365 near the beginning of Fall quarter 2012. Our plan to proceed slowly and cautiously, so we expect the process will take a couple of months.
Our aim is to not do any account migrations over weekends and holidays to ensure our customers can reach our support desk if they have questions or problems. And we expect that we'll cease doing migrations around midterms and finals, since our customers will likely have other things on their mind.
As a result it's difficult for us to predict when a particular account will be migrated, but our guess is sometime between October and December.