By the looks of it you can easily (although I am not very gifted with the knowledge of Wordpress) use the mod_rewrite rule from your apache to make those links. If you could create an extension that simply makes a pagination for it, but displays the url like it has some kind of 'map', you would be out of the woods already, right?
So, like on fora, you would like to have (let's just assume), 3 pages.
Page one should contain the basic information (blog 'n stuff) about the author, page two should display the posts and comments made by the user (in categories of course) and page three for example, latest visits and more gibberish you'd like to put on it.
Am I getting close? Because if so, I guess it's doable.
you should be using permalinks (Admin Dashboard-->OptionsPermalinks) and probably use a custom url structure (and maybe also setup a 301 redirect). More info here: Using Permalinks WordPress Codex . hope that helps.