I've been getting quite a few requests for help with Formal for some time now so I (finally!) got round to creating a mailing list for it.
It's better that help requests go to more than just me because I don't always get enough free time to answer questions.
I used Google Groups. I know it's not perfect but, hey, it's easy to set up.
URL: http://groups.google.com/group/formal-nevow Email: firstname.lastname@example.org
I haven't changed the group much from the default so anyone can view the group but only members can post and it's unmoderated.
If anyone has strong objections to that configuration then I'm willing to listen, but it seems reasonable and will hopefully avoid a bit of spam.
So, I hope to see a few members there soon (I'm going to invite a few people I know of to encourage things along).