Support him BEFORE he bailed out. Ie. he supported the VC thing, although he didn't like the direction.

As for the "skill-set", it's not as if building a web service, and such as simple one as posterous (or twitter, or tumblr) is rocket science.

Scaling it is a little harder, but still, thousands of companies and websites do it on their own. So what What ireplaceable skillset?