eGroups' rss-dev List Appears Vital
If the first week is any indication the rss-dev Group on eGroups is going to be a real hotbed of discussion about content syndication. Only time will tell if the group activity will stay high once the RSS 1.0 spec is finished.
Regardless, this discussion has a number of interesting messages posted to it each day. It is worth following if you are supporting RSS, RDF, or another lightweight syndication protocol.