I hate that this site runs on WordPress.com®, and I can’t install this plugin – or any…
Internal Link Builder
So: You can rank like Wikipedia, without being Wikipedia. Ok, that’s exaggeration, but the tool improves your internal navigation / link structure a lot.
I got the idea from Jim Boykin’s Internet Marketing Ninjas, which includes a similar tool.
Also note: Marios Alexandrou of All Thing SEM updated the plugin for WP 2.9+ and currently handles tech support.
To use the plugin, the settings page is under the Posts menu -> Keywords in 2.7+. It’s under Manage -> Keywords, in older versions of WP (up to 2.5 or 2.6) .