There's a really good, in-depth article on the Debian community at ITPro.co.uk. It gives a nice history of Debian's origins and development and makes the case for it as one of the most important factors in Linux's commercial success:
Debian GNU/Linux was the first project to be deliberately modelled on the principles of distributed software development, and provides the core software for many of the more successful commercial Linux distributions. Though Debian does not have the high profile of other Linux distributions the commercial success of Linux may owe more to the Debian community than advocates of Linux in the enterprise are ever likely to acknowledge. - Richard Hillesley
What do you think of this perspective?