A bumper crop of circumstantial evidence surrounding the Android-based PlayStation Phone is starting to come together today -- when it rains, it pours, as they say -- and one particularly interesting thread suggests that the ecosystem surrounding the device might be called "Z-System." An astute tipster notes that the term appears in the upper left of one of our shots, which maps to a domain -- z-system.com, naturally -- that's owned by Sony Ericsson. Turns out the company also holds trademarks for Z-System in the US and Benelux trademark offices (among others, presumably) that were filed this year. It's possible that this specific device is called Z-System, but we're going to floa
