Just ordered mine from Ticketmania.com. As we're going for more than 2 weeks and not spending every day at Disney, the 14 day Ultimate pass just wasn't suitable for our needs.
Decided to get 7 day Magic Your Way passes, but without hopping or plusses and as these aren't available from UK suppliers (or at least the ones I tried), so had to get them from a US website.
Ticketmania were the best on price and as they seemed to come highly recommended on these boards, thought I'd give them a try.