excellent, really excellent!
this is far the best guide about modelling for modding, if you want my opinion, since it isn't only a collection of infos but more important it "show the way"
there are also some tips i didnt know, like the rules 2 and 3 about stable geometry (actually i have some doubts about rule three, but i have to check)
there is only a thing missing that may improove your guide, the step by step modelling with screenshots, to show basic strategies and "how you have to think", i was building something like that from the model to the textures, but i never find time to do write it:p
good work:)