TheOptimizationIdiot - 4:26 pm on Mar 11, 2013 (gmt 0)
Had the same thing happen once not too long ago.
Threw the site back up, went on my way and did other things thinking it would take a while to get back where it was if it did but within a week it was right back where it was before the "renewal oops".
It sounds like yours is a bit bigger so it might take longer to get through all the pages again but I don't think it's the "debacle" it may seem. It wasn't in my experience anyway.