Sony Ericsson looks to set to announce some of it's new range of phones this Thursday. Looking very likely is a mini upgrade to the P900 the P910 which features a new flip with a keyboard on the reverse. Also possible is a second UIQ phone, possibly, utilising the new UIQ 3 which can be operated without pen input. Whatever the case we'll keep you updated.
There are several sets of pictures floating around the net (see some here http://www.allaboutsymbian.com/forum//forum/thread/25633/), but it not clear whether they are genuine or fakes.