I though that i0n1c from chronic dev team had said that there were at least 5 holes in the A5 and that a jailbreak wouldn't take long...but now I see this on his twitter page:
i0n1c: if you see my name on any iOS5.0 jailbreak then it is fake.i am not involved.i am busy writing a book.no time to release a jailbreak.
i0n1c: if you see my name on any iOS5.0 jailbreak then it is fake.i am not involved.i am busy writing a book.no time to release a jailbreak.