FYI, all of my above posts/lists are now obsolete. I'm no longer updating each individual list.
Instead, a database-driven site has been setup to encompass all of the information of those posts, and much more.
Mods, portrait sites, modding communities, gaming forums, custom sites--they're all included. People can also submit any link that may not already be included.
Please take a moment to visit and bookmark the site. It's the culmination of much hard work, and I hope it proves useful to everyone.
The Infinity Engine Modlist can be found at
http://modlist.pocketplane.net