For its Xperia X10 smartphones, Sony Ericsson designed a new user interface from scratch. Called the User Experience Platform or UXP, it sits on top of the Android operating system on the Xperia X10, X10 Mini, and X10 Mini Pro smartphones.
Here are a few shots of how the UXP interface actually looks on the X10 mini pro.SE has done a fantastic job shrinking it for the smaller Xperia devices.