is there a full setup guide for mongo_mapper, haml, rails3 and devise, for the current git (master) branches? a lot of things changed in all of those frameworks/libs lately. i was wondering if somebody has it up and running and can share it on github or give some pointers...
Railscasts have a couple of Rails 3 specific casts on Devise setup and customizing - might be useful,
http://railscasts.com/episodes/209-introducing-devise
(210 is the second cast on customizing Devise)