There have been articles in the Rivendell Reader on how to adapt older bikes to suit the needs of the current owners, usually involving getting the handlebars positioned where they want them and giving them a useful gear range. There have also been articles about what to look for in an older frame to make it a good candidate for 650B conversion. Grant encourages people to build up bikes using whatever ideas they might find useful. He's even up front telling us they aren't even his ideas and he gives credit where it is due.