Since I'm a big fan of custom fields and custom post types, my work often deals with migration, demo content, and a lot of client tutorials. The latest site has two very similar post types and it would be handy if we could duplicate one type into the other!
I'll be checking into this today and will report any findings. I would like to keep this feature on the site though, so I am curious as to whether this feature would make it into the plugin during the next revision or not.
What do you think?