tag lists

OK I've been trying to work out ways of doing this.

As a start, I made history/tags/tag work slightly differently. Now, instead of getting 404 page not found at history/tags, you get a list of all tags that have history articles, with the number of articles in it and a link to the history/tags/tag url. (John this isn't the same as directory)

That's a start - about to do the same thing for news.

At the moment libcom.org/tags is a different page, but if we kill the url alias for that page or change it to a different path, libcom.org/tags could be a list of all tags everywhere on the site - again with the number of articles attached. It won't be as pretty but it'll work.

Which just made me think we should maybe have a tag cloud on all /tags/ pages as well, not that it affects this.