A colleague just returned from the INBOX conference in San Jose, California. I asked what he thought of the gathering, which bills itself as "The Email Event." While the crowd was smaller than he expected, he said the sessions on RSS and deliverability in particular were well-received.
The most interesting part of the conference however, was the extracurricular discussion.
Sender authentication seemed to be the most talked-about subject. People expressed frustration over the lack of a universal, working method, and discussed difficulties in implementing SPF, SenderID, Domainkeys and DKIM, and in getting sluggish IT departments to move more quickly.