Already found in several countries is the X10 Mini, now a newer QWERTY-enabled version of the Android phone is due to arrive. Vodafone will be stocking the Sony Erricson the thicker newer version. Its "Coming Soon" page has a featured entry for the X10 Mini Pro which allows those to register for the Mini Pro when Vodafone is prepared to release the phone.
The QWERTY slide keyboard is expected to appear on low-end tariffs similar to the X10 Mini. With a keyboard that small it will be interesting to see how hard it will be, but at least it's an improvement over the original X10's numeric only keypad. Vodafone has given out an X10 Mini Pro, any information on it should be asked to them.