On the other hand, having a big security problem wakes everyone up to the fact that there's a problem. MtGox did hire security consultants; whether they hired good ones is another matter but it's not like they fixed the one issue and everything stayed the same. Do you touch any MS products? At least MtGox thus far hasn't allowed arbitrary code to run on your machine!

MtGox is still the easiest way to deal with BTC <-> USD. I don't trust them enough that I have a lot of either currency in the account at one time but I didn't have a lot before the breach either.