iOS WWDC iOS5 for developers

[sth]

It uses the accellerometer : /

Then all you can do is either wait for the GM seed or get an iPod Touch as a test device...

 

[jsnuff1]

I want to install iOS 5 as well, but want to be able to revert back to 4 in case something goes wrong.

My current device is jailbroken and have SHSH blobs saved. Shouldnt I be able to revert back to iOS 4 using this downgrade proccess? Or does this downgrade not work with beta releases?