ArmchairGM was originally created by four people and launch in early 2006., before being purchased by Wikia last December for around $2 million. Based on the hugely popular Mediawiki software, ArmchairGM allows users to write and share sports related articles.
Similar to Digg and other social voting sites, ArmchairGM has added the ability to vote for good articles written by other users. The main page includes the most popular content from all different sections of the site, but you can limit the articles to any number of the sections at the top of the page (MLB, NFL, College Basketball etc.).
Each user starts with 1000 points and can receive points for writing popular articles, commenting, and otherwise being involved with the site. Users can add each other as 
friends and send “gifts” like foam fingers for good stories. A lot of the stories are really well written, and the comments are usually relevant and constructive.
If you like a particular sports team, you can use the search to narrow the articles to those written about your team or school. For those of you who prefer reading in RSS, its RSS feed is available here.
The site supports an extremely well-designed interface and has 40,000 pages in its shell. It’s a completely free service on the user’s end and its revenue model consists of — purely and simply — running a Google AdSense along its content pages.
