Official firmware 5.50 is here and it has blocked the Tiff exploit but they have added some new features...
Quote:
The PSP® system software version 5.50 update includes the following:
playstation network Information Board
[Information Board] has been added as a feature under playstation network (PlayStation®Network). The information board displays news about games and the latest information about PlayStation®Store.
Other new or revised features in 5.50:
Overall
* The number of folder levels that you can view under Sleep timer (Photo), Sleep timer (Music) and Sleep timer (Video) has been increased.
Game
* If you select [Internet Search] from the options menu for a game, you can now perform an Internet search based on the name of that game.
Network
* [Trend Micro™ for PSP™] has been added as an option in the Internet browser.
PlayStation®Network
* You can now access PlayStation®Store even if you do not have a PlayStation®Network account.
# An option to sign in automatically is now available for PlayStation®Store. Select [Sign In Automatically (Auto Sign-In)] on the PlayStation®Store sign-in screen.
# [Download All] has been added as an option for use when multiple items are purchased from PlayStation®Store.
# Less free space is now required on Memory Stick Duo™ media when downloading games from PlayStation®Store.
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Source Download
Tried to run it through the PSAR Dumper but had no luck. It won't decrypt
