I spent last week at RailsConf, my favorite conference.
When Rails supported REST, that was a huge step to supporting great, flexible APIs, but it didn't bring a lot of its signature convention to how to deal with Rails APIs. That was a subject of Yehuda Katz's talk; how can the Rails community center around the correct conventions for APIs so Rails can start to support them. That talk and one about FlexibleAPI have me thinking that this type of thing will be a major theme for Rails to come.
Also, as always, RailsConf did a worked to feed back the history of programming into the community. It came in the form of a crazy performance art Keynote by Guy Steele and Richard Gabriel