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.

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.

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.

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.