Andrew, thought you might like to see what I did with this. I did some tweaking of the layouts, and also added some instructions for our users, with the Categories and with the Links. There are also submission instructions/guidelines on the addlink and addcat sections, which of course you can't see without being a member. It's integrated into our forum index using forum set up as a forwarding link (under the Around the Corner section of the index).
http://www.sunshineband.org/forums/f...splay.php?f=16
Lovely hack!