TinyUmbrella has been Updated to v5.00.01 to support iOS 5 B2. TinyUmbrella enables you to downgrade your firmware version, for example from iOS 5 to iOS 4.3.3. This is something jailbreakers need to jailbreak their device with Snowbreeze. Till now TinyUmbrella is only available for developers since they are the only one who can get their hand on iOS 5 Beta 2.

You can download TinyUmbrella 5.00.01 from the official TinyUmrella blog here.