Here are some links I think many of you will find quite useful.

Arch Linux Official Website

Arch Linux's offical website where you can find news and updates about Arch Linux. http://archlinux.org

Arch Linux User Repositories

In the AUR, you will probably find many packages that aren't available in the official repos. The most popular packages get put into the community repo, saving you a bit of time compiling. http://aur.archlinux.org/