In February we spent quite a bit of time on the Sony Ericsson stand. Their new range of Android-based phones includes the X10 and the tiny X10 Mini that's currently available on a number of networks here in the UK. The phone that impressed me the most was actually the X10 Mini Pro, which is the sliding QWERTY version of the X10 Mini. Personally I think it'll do really well and the form factor is a winner.
Vodafone have just added it to their "coming soon" section, so you won't have long to wait. It's got a 5 megapixel auto-focus camera with flash, GPS, 240x320 pixel (QVGA) screen, microSD, FM radio, WiFi, 3.5mm audio jack and Bluetooth.