Ok, here's the nightmare. Bought Vista Ultimate full edition - clean installed on my main system. Went online and bought two more license keys for $105 after tax - tried to upgrade my other machines (each with full versions of xp on them) and the reg keys are invalid. I've got receipts, order numbers and have practically memorized the keys by now, and all MS says (via Mr. Prabhu) is "the vista team is working on it". Just give me the darned keys man - don't take a week thinking about it!
So far out $105 (non-refundable) for two keys that are invalid!