In case you needed any more evidence that Sony is ramping up to launch a gaming system on a phone in the next few months, here you go: Japanese rag Asahi Shimbun says that the PlayStation Phone -- which could be known as the Zeus Z1, Xperia Play, or something else altogether by the time it's on store shelves -- is expected in the spring of 2011 for a North American and European release. That lines up with virtually everything we've been hearing lately, and it's also fortuitous timing considering that both CES and MWC are right around the corner; we don't know what Sony Ericsson might have on tap for CES, but we definitely know they're planning some new Xperia-branded models for MWC. There are many questions left unanswered -- how (and if) any of this ties into the standalone PSP2, how gaming titles will be purchased, and how many models will be available that support the platform, just to name a few -- but hopefully Sony can clear all that up here within the next few weeks.