Users are reporting that a new update for the Xperia X10 has been released. The update brings the build number up to 2.1.B.0.1 which was certified on the PTCRB site on May 24th. The baseband version has also changed to 2.1.67.

There isn’t much information on what the update does but, users are reporting an improvement in battery life, as well as over all performance.

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It appears that the Android Market has been updated on Xperia handsets which adds a link to Sony Ericsson apps. The update doesn’t actually appear to be a market update however, as there wasn’t a notification and uninstalling any Market updates, does not revert the Market to how it was.

The new market sees the “My App” icon replaced with a phone icon and the words Sony Ericsson. Clicking on this will show you various Sony Ericcson apps, like Xperia Hot Shots, or Timescape extensions and also apps supported by your handset, such as FourSquare, TweetDeck, SwiftKey Keyboard and many more. For those who use the my apps icon frequently, you will now need to press the menu icon and select “my apps” that way to view what you currently have downloaded on your handset.

When Sony Ericsson announced that they would not be upgrading the Xperia X10 past Android 2.1, this left a lot of users very angry and caused many to swear they’d never go back to Sony Ericsson. In light of this, Sony Ericsson have listened to the feedback and have today confirmed that the Xperia X10 will be updated past Android 2.1.

They will skip Android 2.2 and move straight onto 2.3, which is currently the latest version of Android available. The work they’ve done with the new line of handsets, the Xperia Arc, Neo and Play has enabled them to work with Android 2.3 and gave them a solution to making 2.3 possible on the X10. The update will be Android 2.3.3 and will become available from the end of Q2/early Q3.

The Xperia Arc isn’t even out yet but, the system files have made their way over to XDA-Developers, enabling you to load the home launcher of the Xperia Arc on to your Xperia X10 handset. You can either download the full set of system files from XDA-Developers here, or downloaded the home launcher apk and a couple of other useful apks in a much smaller zip file here.

Included in the smaller zip file is the HomeLauncher.apk, which gives your home screen a new look, as well as your menu system. There is also GenieWidget, DigitalClockWidget and PhotoWidget. PhotoWidget gives you a quick access to the 3D gallery on the Xperia X10, which by default is hidden away under the custom Sony Ericsson user interface. The Genie widget gives you access to local weather information and news, you can select one or the other, or both to be shown on the homescreen. While the DigitalClockWidget replaces the existing X10 clock widget.

Yesterday we heard that the promised dual touch update for the Xpeia X10 would be released in Japan. We can now confirm that there have been no delays in releasing the update and users with Japanese Xperia X10 handsets are now able to download and install the update.

As we previously said, the update is currently only available through PC Companion, or SEUS. From tomorrow onwards though, the update will be able to be applied as an OTA update. The dual touch update brings the firmware version up to 2.0.1.B.0.19.

Those with the update are reporting that the dual touch is really smooth and fast. Also as of yet, no third party apps have been listed as having any issues.