I don't use xchat, so I don't know specifically, but I think that in general things with 100 options should be command line or config file based. Now things (like a word processor) with 100 actions are different, but if you've really got 100 settings, they don't belong in a menu or setting dialog; at best you might have a settings dialog for the most common ones, and good documentation for a config file for the rest...

Just my thoughts, and I know there'll be lots of disagreement on that.