It appears (at least for me) that the Lion up-to-date site is not working. It says my serial number is not found (even though the same number works to check my warranty status). This is for an iMac purchased on June 8 '11. I just got off the phone with Apple support and they said they were aware of the problem and that my serial number was good. Just thought i'd pass it along if anyone else was trying and having issues. I'll probably wait until the first patch is released anyway but have to download it anyway to get it free.