Tried it, just restored the phone. Looks like everyone is doing it at the same time, all the sources are dead. I also noticed the phone being more sluggish (eg unlocking the screen). Maybe a coincidence but screw it. There were only a few things I wanted and turns out they're actually f'en expensive - like intelliscreen. I'll just wait for apple to implement that properly.
But I can confirm for anyone wanting to try that you can restore your phone almost 100%. All my texts, savegames etc are still there. The only thing it didn't restore is the music.