After premature announcement of Gingerbread for Xepria X10, Sony Ericsson promised us to deliver the actual Android 2.3 Update soon and it comes real quick. Finally Xperia X10 Gingerbread Update now rolling out through Sony Ericsson PC companion App. you can download the update right now from Sony Ericsson website
Along with unbranded X10 the update also available for some operator kits, but those user who have installed other ROM or customized their X10 will not see the Update. In that case you may follow this thread over xda forum to Download Gingerbread Update for Xperia X10 and install yourself. Stay tuned with us at Facebook and Twitter, Google Plus to get update on latest Sony Ericsson Xperia X10. source.