Not cheap but lowest price inc. contract for a year I could find by a large margin. (These phones are selling for £350+ on ebay.)
As always, there is risk with these cashback deals.
Latest Orange SPV, only released a few weeks ago, featuring:
* 2 Megapixel camera
* Bluetooth technology
* digital zoom
* infrared connection
* Microsoft Windows Mobile version 5.0
* Mini SD card for external memory
* quad band technology
Also has built-in GPS, capable of working with TomTom software.