The Colbert Nation The #1 Colbert Report Fan Site // fake fansite for colbert report done by the show itself ["by the show" =?] // unoffical, yet stunningly busted-looking Colbert Report fan-site [busted?]
Answers from http://en.wikipedia.org/wiki/Talk:The_Colbert_Report: don't yet know about "busted-looking" but as for done by the show itself:
4 Colbert Nation
What do people know about Colbert Nation? It says it's unofficial and claims to be written by a man named Avery, but Colbert referenced it twice on tonight's show (Show #2) and it has a letter from him on it and a link to it from comedy central's website. It wouldn't suprise me to know that Colbert does the whole thing himself.
I would almost bet my life on the fact that the website is run by someone with the show, if not Colbert himself. My first clue was when the first show aired I went to the comedy central site and it already had a link to the "unofficial" site.
The domain is owned and hosted by Comedy Central. I simply assumed it was a joking poke at astroturfing { formal public relations projects which deliberately seek to engineer the impression of spontaneous, grassroots behavior. goal is the appearance of independent public reaction to a politician, political group, product, service, event, or similar entities } and written by TCR writers. --19 October 2005
A few weeks ago, most of the material that's on Colbert Nation now was on the Comedy Central Colbert Réport website - including Colbert's letter naming Avery Gordon as his webmaster, and a blurb from Gordon describing being tapped for the job. So it's safe to say it's official. --19 October 2005
That seems right. Okay, official website it is. --October 19, 2005
indeed: Colbert Nation official website

and also among Wikipedia's external links:

Del.icio.us RSS of Colbert TVlog posts

Unofficial one-trick Colbert Report website

NPR's Fresh Air With Terry Gross Pre-Debut Interview from April 8, 2005
NPR's Fresh Air With Terry Gross Post-Debut Interview from December 7, 2005
ooh check out Colbert with Terry Gross