I think Moore shouldn't be so vehemently nasty about it all when even if he doesn't agree with what they're doing, the people involved with the movie are putting in plenty of effort to make something decent. Also, cursing people is just mean. (He might not have actually done that, but thought I'd mention that it's not nice is he did.)
However, though I am excited to see the movie and how it turns out, and am sure it'll be fun and cool to watch the comic come to life, I think the film adaptation is kind of redundant. What's the point in producing a copy of something just in a different medium when the original is just fine? And I don't want Watchmen to be changed in any adaptation, so I figure it makes the most sense to just leave the book alone. Hopefully the movie will be faithful and still stand on its own. And it sounds like it will be... But I do hope there's not even half as much slo-mo as there was in 300, and I'll just have to wait and see about that.