Yet another message board. This one uses Simple Machines Forum (SMF). It came with the web host, so I'm just trying it out, but it is very extensible. Already, I have added BBC tags to allow autocarding (see below) and eventually more tags to come.
Autocard script that lets you lets you view a card's image when you mouseover a link in Magic-related forums and websites. Works in Opera as userscript and with Greasemonkey.
Install Autocard extension for Opera 11+
What (Magic) color are you? White, Blue, Black, Red, or Green. (Featuring illustrations by Terese Nielsen and Melissa Benson.)