I have a friend who recently informed me of their venture into the world of Linux. I started to build up a good set of links and thought I would share. Here you go.
The Ubuntu Guide - A Wiki for common setup and configuration tasks in Ubuntu.
Ubuntu Tweak - Simplifies some Ubuntu configuration tasks as well as application and driver installation.
Appnr - Find Linux Applications
Dual Boot Reference - For those who want to hang to Windows just in case.
Gnome Do - This is one of my favorite applications in Ubuntu. Thanks to Gnome Do, I never have to swim through menus to launch an application. Learn it. It will save you time.
Here are some good Linux blogs.
Productive Linux - A blog about performance and efficiency in Ubuntu.
OMG! UBUNTU! - A blog that follows Ubuntu news very closely.
Full Circle Magazine - A Ubuntu magazine.
Mark Shuttleworth's Blog - Founder of Canonical Ltd. which backs Ubuntu.