If Silicon Valley were a bar, this is the point at which Marc Andreessen would ask Carl Icahn if he wanted to step outside.
Andreessen, a venture capital titan, is going about his business. Icahn, an activist investor notorious for mixing it up in fancy establishments, keeps getting in his face. He says Andreessen has been double dealing from his board seat at EBay, one of seven companies at which he is a director—a roster that includes Facebook and Hewlett-Packard.
