Not everyone has caught up to Vista, yet-- and it may be some time before they all do... so it may not be available. You could Email your
Mobo maker -- or see if they have forums, to get an estimate-- whats your hurry (to upgrade)?
New releases all go through this-- and Vista was delayed and delayed and delayed again... then it was postponed a few times.I would not be in any hurry, personally. Let others work the bugs out.