Oh, hey, cool. I heard about Webbynode with the video that RailsEnvy did documenting the reasons to use it (which I found on Rubyflow). Can't seem to find it right now, but really liked the features. We're on Linode right now, but looking at our other options...
Our main difference is providing ReadyStacks for easy bootstrap of servers: watch the screencast for more info here - http://webbynode.com/railsvimeo.