Citing "personal reasons," the Symbian Foundation has just announced that executive directory Lee Williams has left the company -- yes, "left," as in he's not going to stick around for a while to manage a transition. Williams has been steeped in Symbian for some time, having previously led Nokia's S60 business -- but the dude's been floating around the upper ranks of the entire mobile industry for ages, doing time with Motorola (through its Symbol acquisition) and Palm / PalmSource by way of Be. He's been replaced by the organization's reigning CFO, Tim Holbrow, and it appears that the appointment is permanent; what this means for Symbian's roadmap (if anything) is unclear, but we'd love to hear the backs