The xxx_custom.js concept would apply equally well to the .css style sheet. If mobi one generated a blank xxx_custom.css file (if it doesn’t already exist) and inserted a reference in the html page (right after the xxx.cs), the users could override some of the styles create by mobi one. For instance, I wanted to make a list that had a slightly transparent background, so I added a new style sheet that overrides the styles created by Mobi one for the list items. Unfortunately, I have to remember to make this change each time I let MobiOne regenerate the html page.
Along the same lines, I would like to include some standard .js files. If mobi had a way to accept a list of files to be included in the html page when it is regenerated, that would be very helpful, since I would have to manually edit the generated file.
I think those sound like small requests — but they would be extremely helpful.