Potentially everyone's details got stolen! Well, usernames, passwords, dates of birth, that's about it. Credit Card details and stuff were encrypted, and there's nothing to suggest anyone could have breached the encryption.
Yeah, it's for everyone. I expect the 2 free games to be pretty crap, maybe stuff like TV Show King (I bought that for 99p anyway, although admittedly it's not bad, offering that would be a bit of an insult)
The month's free PSPlus, though... That could be worthwhile. There's a lot of games and add-ons available cheaper on PSPlus, and some even free.
Still, this downtime's a pain in the ass for us honest types.