Robert Scoble is leaving Microsoft. That’s big news for the company.

Scoble’s impact on the Microsoft’s image has been profound. He reminded us all that the company isn’t just a few aggressively competitive and astonishingly successful businessmen, but it is also thousands of individual employees who are probably a bit like you and me. This was an important accomplishment for Microsoft.

The 2006 Edelman Trust Barometer found that “in six of the 11 countries surveyed, the ‘person like yourself or your peer’ is seen as the most credible spokesperson about a company and among the top three spokespeople in every country.” And Scoble has been tremendously successful in becoming “the person most like me” for most bloggers.

Without doubt, he put a great face on Microsoft. And he continued to do this even in his post about leaving the company. Complimentary all the way through. A class act.

So what now? In his post about his decision to leave, Scoble himself observed:

I’m not the only blogger at Microsoft. There are about 3,000 of them here. They are not having the plug pulled on them. They changed the world. I just was the cheerleader.

Microsoft desperately needs a chief cheerleader to follow in Scoble’s footsteps. But none of the 3,000 bloggers in the company currently come anywhere near his profile.

Are any of the current bloggers capable of stepping into his shoes? Or will Microsoft have to reach outside the company to bring in another outsider with Scoble’s combination of skills as a communicator, cheerleader, networker and all round nice guy?