The mass exodus of both execs and rank and file employees at Yahoo continues. In fact the real defections may just be getting started at a high percentage of employees vest on lucrative restricted stock units this month.

Yahoo’s head of communications Jill Nash continues to try to keep the resignations as quiet as possible, and suggests informally to press that most of the high level departures are really just a cleaning house procedure.

What a housecleaning.

Two more SVPs are bailing out. Previously reported was Todd Teresi (pictured left), SVP of Network Business. Teresi is now the Chief Revenue Officer at Quantcast.

Now we’ve heard that the number 2 exec at Yahoo Mobile, ten year Yahoo’er Steve Boom (pictured right), has resigned as well. Boom started in Yahoo’s London office in a business development role. More recently he oversaw Yahoo’s broadband partnerships with AT&T, Rogers, BT and Verizon.