I've been using IRC since the ending days of Digimon Frontier in March 2003.
I use IRC for my main source of communication with people online besides LJ and email. My MSN is generally for fansubbing business + emergencies only, and I only go on AIM for specific purposes. I don't like Skype (it doesn't work well on my connections), but I use it when I have to... D: LJ and email are one thing, but IRC is real-time + all those other differences that come with it.
For those who want to get on IRC, but don't want to/cannot download an application for it, you can also use an internet browser + Java. D:
The one seraphimon_0000 just used was http://www.jpilot.com/products/jirc/demo1.html
To join chans with passwords
I'll take recommendations for more user-friendly, reliable sites or just whatever that would get people to join in. :)
If just going on Blitzed server: http://cgiirc.blitzed.org/