seriously, this wasn't a bubble pop - it was a DDoS attack - roll back and it would make a statement that you won't take bitcoin down with these kind of attacks.
do nothing and the media will have a field day and bitcoin will take a long time to recover..
then of course MtGox needs to do something about it - halt trading at a certain level of lag or something!
even those who bought cheap coins shouldn't be against this, as long as they already held a few.
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edit: I've changed my mind, as long as we keep rallying, we may be better off without a roll back - however painful that was.