I've had this problem too. Was trying to sign up for the llvm HS lib list but cant. I asked on Haskell irc and no one seems to know who admins the lists currently.

On May 12, 2013 7:24 AM, "Tim Docker" <tim@dockerz.net> wrote:
Hi,

Has anyone noticed problems with the mailman instance running at projects.haskell.org? As best I can see there are no new posts in any of the hosted list archives since mid April. I know that there have been posts made to chart@projects.haskell.org in May, and these have neither be distributed or archived.

I've not had a response from mailman@projects.haskell.org.

Tim

_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe