While it would be nice to have an updated "ConTeXt the Manual", in my humble opinion the biggest hole in the documentation is a reference for each command. Texshow-web should fill this gap and this is where the community CAN contribute, and where the mechanism already exists. And because it's made up of small articles it could work. When I learn about a command I try to fill in a few words in texshow-web. If everyone added a few words each time they learn a new command, we would soon have a fantastic reference source.
Richard
P.S. One request for improvement to texshow-web: the source-file for each command is included in cont-en.xml, could this be displayed on the command web-page? It would make it easier to find the source if you need to.
I have promised to Taco that I will transfer the contents of texshow-web to the wiki this month. Then we can do everything the wiki can do now. Patrick