I've been busy collecting some really great stories from people using Gentoo in places that I really didn't expect. There are some gems like this one:
Hey, I'm the CTO of a small company in Sweden, and this is our short 'success story'
blogg.se is a Swedish blogging platform which generate 130 000 new entries, 150 000 comments and 2 500 new accounts on a daily basis. We currently (September 25th, 2009) have a reach of 2,2M unique visitors per week.
Gentoo has always been the preferred OS choice for us. We (the developers) were all attracted by its 'sane' defaults and clean approach to software deployment.
Here at blogg.se we use Gentoo for all our staging, testing and production environments.
more here