I was going to ask about that, so I don't have to worry about my Vita being at home if they happen to patch it? Can I use email on wifi if I have an old version, or will it ask me to update?It was mentioned on twitter that this is all done through bugs in the e-mail app. Every firmware it is on from 3.52 down has these holes in it.
https://twitter.com/frtomtomdu80/status/646748111633780736
So you don't need to worry about buying anything, and won't have to worry about updating to 3.52 if you are on some other 3.XX version.
Also, I didn't see one, but is there an all-encompassing post that covers what this exploit is? I gather it's on Wololo, but I haven't checked yet.