Mibbit now does HTTPS 
We do not have a certificate yet (On the way), so you may have to click through a couple of popups on your browser saying it can’t verify the certificate.
However, once that’s done, you get complete encryption and peace of mind someone isn’t snooping on what you’re saying.
Also, when you click on a user in the userlist you now get a menu for them. At the moment there’s only one item (PM), but soon there will be whois, maybe a mini profile, and if you’re an op you’ll also see kick/ban/etc type options there.
Related posts:
Nice to see… Does your backend already support ssl connections to IRC servers, too?
I cant seem to get on a specific IRC server after update. It connects but then doesnt join to any channel.
hijacker: ssl to IRC servers is on the todo