IRC stands for Internet Relay Chat. The client that I use is mIRC ( http://www.mirc.com/mirc.html )
The minecraft server is back up now, btw.
I'm looking to get some people to help stress and bug test DisplayShop Saturday night starting at 8pm Central Time.
I'll have my server (generalbadass.no-ip.info) running it throughout the weekend, but I would like to see if I could get a decent group of people all on at the same time and create a few hundred (thousand?) shops and see how well it currently handles it.
I want to note that I've only spent 3 weeks working on this in my spare time, so it is not a complete plugin, but has most of the basic functionality implemented and working.
I am also using Trello to document progress and feature requests. If you would like to be added to the board, just let me know here and I will add you.