According to the PTCRB site, a brand new firmware is listed as of December 20 with software version number 4.0.2.A.0.62. No, this is not the Ice Cream Sandwich update as the manufacturer was kind enough to let the world know we should expect it between March and May of next year.
If you have a Sony Ericsson Xperia arc, arc S, neo, neo V and PLAY, you might want to keep an eye out for the new firmware. According to the Unofficial Sony Ericsson Blog, you shouldn’t expect any new features but a couple of bugfixes. The firmware itself is “mainly targeted to MENA (Middle East North Africa)”.