The Playstation phone being developed by Sony Ericsson was rumored for an announcement on December 9th, but that day passed without even a peep. Now, we still have no firm word on when the handset will release, but the Unofficial Xperia X10 Blog is reporting that the Playstation phone will likely be labeled as part of the Xperia family and may be called the Xperia Play, along with many other possibilities.
Apparently, some European Union trademark filings from Sony Ericsson for the phrase 'Xperia Play' were found by Pocketnow. The Official Sony Ericsson Blog took it a step farther in their search and found that various internet domain names for XperiaPlay were registered to a company that has Sony Ericsson as one of their clients.
In regards to the other possible device names, Engadget is reporting that Sony Ericsson also registered Xperia Arc, Xperia Duo, and Xperia Neo. However, the Xperia Play name still seems to be the strongest contendor, as there is no word on whether the other naming possibilities have had domain names registered as well.
Image from Engadget
Source: Unofficial Xperia X10 Blog