CodeIgniter's Website not written with CodeIgniter

[eluser]Derek Allard[/eluser]
Well explained Colin.

Other advantageous of us using ExpressionEngine for this site is the numerous and already tested tools it provides us, such as these forums, the wiki, download tools, etc. The membership system is something we've integrated across expressionengine.com, codeigntier.com and ellislab.com, allowing us to share membership information for people who are part of both communities.