From Robert Scobles site:
Adrian Sutton thinks that an evangelist must be a Koolaid drinker and that he’s blown any chance at getting an evangelist position because he’s spoken out against Microsoft. No, no, no!
An evangelist must be an authoritative, and credible with software developers.
Did you miss where I say pro-Apple or Google or Yahoo things and anti-Microsoft things?
Now, credibility and authority come from being able to see the good and bad in any technology. I’ve never seen a perfect product or a perfect technology yet. If you think you have you’re not going to be a good evangelist.
Particularly because as an evangelist you’ll need to convince software developers to build software for something that doesn’t exist yet. If there isn’t a perfect released product there certainly isn’t a perfect beta out there.