I clicked "no" to the first question because I wouldn't participate as a writer, but I do read and comment (although not on everything).
I would love to see the community move to Dreamwidth. I didn't even know about this poll until bethbethbeth mentioned it in her journal - I'm a member both places but I'd only been watching on DW (I thought everything was crossposted).
When you say "migrate the community" do you mean using the shiny new community-import function? If so I don't have any personal advice (I've been considering doing it with snapedom, but haven't yet), but I bet it would work fine. The only thing is that you pretty much have to close posts/comments entirely on the place you're moving from or people will not actually make the move. And in the case of DW it might be good to make clear that you needn't have an account, you can use OpenID (although I don't think IJ can function as an openid server... could be a problem for those people who only have IJ accounts and not LJ ones).