Just installed my second Brad Choate plugin, and sent my second Trackback ping.  Fun fun fun!  MTIfEmpty gives you an extra set of tags to use in your Movable Type templates.  If you have a variable that’s sometimes empty and sometimes not, you can encircle it with <MTIfNotEmpty> tags so the variable will only display if it’s got something inside.  (Duh.) I used it for my category template, because some of the categories have descriptions (like the Discography) and some don’t (like Weblog).  Previously it was showing a blank white box for categories with no description. Thank you Brad!