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No bro ps vita is not jailbroken.
What you see is a psp keneral exploit which is running inside ps vita's psp emulator.For that you need to buy specific games digitally but all the games have been patched as of now.Wait for few more days a new game is going to be announced on latest vita firmware.Check wololo.net frequently to know the name of the game.It will only enable you to play psp,ps1 games and hombrew no ps vita back ups....

oh thanks for the information

well this sucks guess i wont buy one if i cant jailbreak it

Yes you can. I jailbroke mine.

here it's possible