There is an active openrdf community that uses the sesame-users
Google Group to communicate. You can browse through the group messages online without joining, but you'll need to
join the group
to be able to post.
There is a second mailing list, sesame-announce, where things like new
releases and events are announced. This is a low-volume mailing list and posting
is restricted to project administrators. Please
subscribe to sesame-announce
and we'll keep you posted on new developments.