REVISION:
Well people! This is my short-list of CGI IRC that have access to all servers, bearing in mind, there are no restriction placed by your Internet Access Point...
http://www.ictoadd.com/cgi-bin/irc.cgi (no longer in action)
http://www.galgenberg.net/cgi-bin/cgiirc/irc.cgi?adv=1
http://www.polarhome.com/cgi-bin/chat/irc.cgi (works well, always has)
http://www.caffeine-powered.com (permanently off-line)
Kind Regards,
The Magic Monkey