Get your hopes up about that Sony Ericsson Windows Phone 7 slider that surfaced over the weekend? Well, then we're afraid we've got a bit of bad news. According to Mobile Review's Eldar Murtazin, it's just an "old prototype that was canceled last year." As we mentioned previously, however, that shouldn't exactly come as a huge surprise, considering that Sony Ericsson has repeatedly stated that a move to Windows
