New freenode webchat (and why to use it)
I remember awhile back, the server opers would frown upon banning Mibbit users. I guess they had a change of heart due to abusers using Mibbit to dodge bans. I remember having to place broad bans on Mibbit on a temp basis, but it was always temporary bans that I placed. I even became a Mibbit user. I hadn't joined the server using Mibbit in about a month so something happened recently for Freenode to lock out all Mibbit connections.
For now, Freenode is hosting its own web-IRC client: http://webchat.freenode.net/