Just some ideas today while mucking around.
I love the ease of customising the toolbar. Would be nice to have an identifier tell you the position of the toolbar. (top,bottom,left,right)
For instance: When toolbar is at the top or the bottom I choose a certain button that is thin and long, when on the left or the right I would want to change that button to be smaller.
Also a command to change the position would be cool.
For the channel lister, being able to halt the list would be wonderful. I was just in quakenet and there are almost 100,000 rooms!! :S
Thanks for mIRC! Its so much fun!! I really enjoy scripting!