I've had help from a number of resources; if I haven't listed you here, it means that I just haven't gotten around to adding you, or that I'm a dork and have forgotten. In either case, feel free to write me and complain.

9) When I was first working on REXML, rdoc wasn't, IMO, very good, so I wrote API2XML. API2XML was good enough for a while, and then there was a flurry of work on rdoc, and it quickly surpassed API2XML in features. Since I was never really interested in maintaining a JavaDoc analog, I stopped support of API2XML, and am now recommending that people use rdoc.