Sony Ericsson has announced a software update for its Xperia X10 Android phone.  The update is rolling out in selected markets now and will continue over the next few weeks.  The update is expected to improve performance, speed, and responsiveness.

According to Sony Ericsson:

This update focuses on improving the general performance, speed and responsiveness of Xperia X10. For example, there are speed improvements in messaging tasks and camera UI. In addition we add a free back up and restore application so you’ll never lose your settings and information. In selected markets, PlayNow with premium apps and games will also be added.

Keep an eye out for the update in your particular market or, for those not willing to wait, just go to to apply it manually.