Sony Ericsson has skipped the Froyo generation and announced back in March it is working to bring Gingerbread on its firstborn droid the XPERIA X10.
Today the 2.3.3 Gingerbread update for XPERIA X10 has been released for all carrier-independent devices. Just go to your local Sony Ericsson website and check if the update has been made available. We can confirm it is already rolling out in the United Kingdom, Italy, France and Germany, so we guess until the end of the day all the unlocked XPERIA X10 worldwide will get a taste of Gingerbread.
source: GSM Arena