I have a question, about the use of URLs.

Let's say I install the sections module, and call it 'Articles' ... now, clicking on Articles in the mainmenu brings you to url/modules/sections ..?

Yes, I'm picky but this doesn't seem right. If I copy the sections subdir to an 'articles' subdir, will this work?

Now I should point out I'm looking at the API and standards level here. Is the path/url hardcoded, is it probed from the filesystem, etc etc ...

Another good example is Agenda-X .. I'd like to shift it to Calendar :)

What are peoples experience here, both at a coding level and a usage level?

You could just download the articles module which is based on the sections module and use that. Then you would have a module like sections but called articles.

You could also try to rename a module before installation. But that requires going into all the files and changing the name of the module to what you want it to be.