I'd really like it if the URL catcher had the ability to categorize URLs by channel (and also by nick in private chats of course). Different channels have different URL-posting tendencies, for example #programming versus #music. There are some channels I'm a lot more interested in seeing the URLs from than others.

(if mIRC already added this ability since the last I checked, sorry, I didn't notice because I had to reinstall Windows and I just now realized I didn't have the Catcher option enabled.)