Well, I am no techie. Just a reasonably competent user. That being the case, though, I am more than happy contributing in terms of regular-user-level tutorials and the like. Largely, it would just be a case of gathering up what I have written here and elsewhere and tidying/updating/standardizing it a bit.
Also, thanks for the info on the wiki spanner. Though, how do people then search for and access that wiki as a wiki?