Thanks for all the quick replies, guys. I'm very impressed with how active the community is for such a long-lived program like mIRC.
I'm more of a C programmer, by education, so this scripting business has always been tricky for me. I hope that by learning something like mIRC I can do some fun things, so you'll probably all hear from me again :P
One question, the join/quit messages generated by your client (or is it the server?), they are not "text" messages as well? I figured, based on how they're displayed, that they would be similar if not identical to the /me messages.