It's not really a Yahoo exec leaving, but it does signal a end to what I like to call "MicroYugo". Microsoft Exec Kevin Johnson is leaving his job to become CEO at Juniper Networks.

So how is this tied into Yahoo? Well, Kevin was the head of Windows and Internet unit and helped spearhead the attempted Yahoo offering. He oversaw over 14,000 employees and directly reported to Steve Ballmer.

Microsoft will not be replacing Johnson. They will instead be splitting Platforms and Services. The two groups will be reporting directly to Steve Ballmer.