Coupla problems with that... First, simply timing : when the server goes up, it's generally because people are (finally) ready to get to playing. Posting and waiting for someone to possibly connect would generally just result in the games being further delayed. Heck, enough time gets wasted waiting for people who came onto IRC for the game and then wandered away from their computer....
Also, even with everyone on IRC there's often an issue with people not using the right mods, not paying attention to house rules for that game (for instance, the occasional "immobiles only" or "Human mages only" game), turning out to not have the map that was chosen, etc.
Speaking of maps, quantum - you have Cirlani on your computers again?
Dunno - if you have an instant messenger program, maybe someone on channel could get in touch with you via that, or best of all, try to find another Mac IRC client. There's a couple listed
here.