Paying to get your UDID activated is real risky, once Apple catches on to these dev accounts, your screwed. I suggest just getting a group of friends and paying the $99 together and adding your UDID that way, won't flag anything on Apples end. I bet there are so many scams out there telling you to pay them for a UDID activation, and even if you get it, the above might happen. and unless your jailbroken, you won't be able to downgrade to 4.*.* and be bricked. ios5 isn't even operating at full functionality yet, its just beta1. believe me, i am on it.