How many ex-Yahoo managers does it take to reproduce a classic Beatles album cover? From left to right: Salim Ismail, Chad Dickerson, Scott Gatz, and Bradley Horowitz. All four were, at some point, responsible for parts of Yahoo's advanced-products group, including the Brickhouse incubator in San Francisco. The band…

Near the end of a Stirr mixer in San Francisco on Tuesday, I ran into Salim Ismail, the head of Yahoo Brickhouse and our newest Silicon Valley Tool, though he'd yet to get the prize for being one of the Bay Area's most annoying executives when we met. I noticed he had the name of his startup, Confabb, on his nametag…