We’ve been hearing from a few sources this morning that Keith Cartwright, formerly a GCD at Martin Agency who left the Richmond, VA-based agency after just 15 months, is heading to San Francisco to join up with the currently unnamed tech/marketing/communications firm that’s being started up by Allison Johnson and Brandee Barker. If you need a reminder of who they are, Johnson is Apple’s former global marketing communications VP who left the mega-brand at the end of March to join forces with Barker, a former Facebook PR exec. We’re doing some digging to get some official confirmation on Cartwright’s impending move and who knows, maybe a name will emerge from the ether.

Update: Hey, what do you know, Adage is now reporting that Cartwright indeed left for San Francisco to launch a new shop with Allison Johnson and former Katalyst head of digital Sarah Ross (Brandee Barker has launched her own consulting firm). Thanks again, tipsters!