- [Theme & Background] has been added to [Settings]. You can download your favorite themes and customise the PS Vita/PS TV.
- You can now check the rarity of trophies.
- You can now attach and send events created in [Calendar] to [Messages] and . Recipients can save those events in their own calendars.
- You can now add Friends and other players to events created in [Calendar].
- The name of the VTE-1000 series has been changed to "PlayStation TV".
- A maximum of 4 wireless controllers can be connected to the PS TV. The number of players depends on the game or application.
See title. Do NOT update if you wish to keep your PSP-mode kernel mode exploit.
http://wololo.net/2014/10/02/ps-vita-firmware-3-30-available-no-official-announce-yet/
If you didn't download an exploit game while you could and now cannot access the store, this is supposedly a working method. I have not tried this myself, however. The games themselves are apparently still available, just the kernel mode exploit itself is patched.
http://hackinformer.com/2014/04/16/a-different-way-to-transfer-games-to-psvita-ps3/