http://www.ticketmaster.co.uk/artist..._header_search
Looks suspiciously like they're trickling back a few at a time into supply rather than as one block (the "find tickets" link as opposed to "none on sale" like the other ticket types. I've not been able to get a screen up to enter credit card details but any of you guys after a ticket would do well to keep an eye on ticketmaster. Also have a look at seetickets.net and wayahead.com as I believe people were successful on there.