New users seem weary of editing gump descriptors (especially when they don't live in their "own" cvs module but they have to change things in the gump repository), and most of them are very sketchy as to the steps one takes to fix things. Niclas Hedhman' recent experience in getting some of avalon to build using gump and the talk resulting from it on avalon-dev and gump-general are a good example of a new user we need to talk through things.
We need a howto. Not just the technical explanation, but some philosophy ("Everyone is free to work on gump. Everyone." Stuff like that) intertwined.