So much for O2’s exclusive pre-sale on Michael Jackson tickets this morning, then. At the time of writing, the company’s priority tickets site has crashed under the weight of demand, alternately throwing up ‘Server is too busy’ and page not found messages when we try to access it. O2 customers who registered yesterday to get a special code are already commenting on our previous story – while predictable, the server snafu is a bit of an own-goal for O2, as it risks angering customers who were looking forward to securing their tickets.”Well my O2 priority password is not valid and neither are 2 friends of mine who have a password!!! To say we’re annoyed is an understatement!! Would love to know who else on O2 has not been able to get their ‘unique password’ for this event to work!!” is one comment.”ive received a code from the 02, but went online at 7am the website says server busy and link broken and phone lines 2402 free on 02 mobile say network busy it wont connect” is another.Ouch. We’ll keep hitting refresh, obviously, and let you know how it goes.