User stylesheets I disagree with, in general; while Brontide has a nice modular approach, you only have in general one userContent.css. Brontide's userContent.css includes other files that do all the styling, so it becomes plausible (given that approach) to do it.

It requires, however, some such well-known package containing a core userContent.css or script to generate one before you can reasonably install various stylesheets. Unless you've got that, they're just so many recipes you can borrow from to build your own monolithic userContent.css; while not impossible, putting them in maemo.org/downloads seems bad to me.