Thinking about FEniCS-Apps, both services allow project managers to
maintain the projects themselves a bit more. That is they can add
people, wiki's, and bugtracking easily. The one feature I like about
Launchpad is that you can specify things in a superproject. This
seems like a natural way to link all the projects and then have the
fenics.org wiki point the whole project. I don't think there is a
mailing list option on bitbucket but if those keep getting managed on
fenics.org then it is a moot point.
So I'm more in favor of up for Launchpad only because it give each
project manager a bit more control, but who knows they may like me
pestering them about copyrights and updating the wiki.
