About a week ago, I came across the Gfx addon. While it's OK for what it's for (letting players with substandard computers actually move in crowded zones, etc) it wasn't very good for borderline systems (many laptops, for example) that can handle most zones just fine, but slow to a crawl in zones like Dalaran (It's magically laglicious, donchaknow?)
So I spent the last week writing my first addon,
Lagbuster ...basically it takes the Gfx concept and gives it some controls, letting you set up four separate graphics setups, loaded by a simple slash command on call, so you can lower your graphics settings in "bad" zones, and bring it back up to High quality in less laggy areas without having to go into the graphics controls manually.
Feel free to rant and/or rave (Dons Molten Core Flame Resist gear)