I often like to use Ubuntu's websites when I'm on untrusted networks (like at coffee shops), but I don't like logging into websites of HTTP and sending my password and session cookies in plaintext.

Launchpad.net does a great job with this, but the rest of Ubuntu's websites should do this as well.

brainstorm.ubuntu.com should be accessible from https://brainstorm.ubuntu.com, and ubuntuforums.org should be accessible from https://ubuntuforums.org.