I used Gentoo Linux on some small NAS devices I purchased from an offshoot of Buffalo Technology. They were called Kuro Boxes. They were basically an external drive enclosure and control board with a PowerPC processor. I bought one and added a hard drive and install Gentoo Linux. It turn out to be a great little Linux Server.
I created a website (no longer up) under the the URL of sumocomputer.com. I lost the domain name (great sadness) due to a great mistake on my part. I sold about 70 of the little devices for $350.00 and turn a tidy profit. The website would allow you to configure the device, and I would ship it so all you have to do is plug it in to your 120 VAC power outlet and cable it to your network and you would be up and running.
The configuration also allowed for setting up applications. The basic version was a LAMP server. That came with Gentoo Linux, Apache, MySQL an Perl/PHP/Python. I had another version that came with OpenQM a Multivalue open source database. You can read about Multivalue databases on different posts on this website.
Gentoo Linux was not for the faint of heart. The installation process was difficult. The update process could be painful. But I found it to be worth the effort becuase the performance of the finished system was fantastic. Gentoo basically compiles itself to your machine architecture. It utilizes all of the advanced features of the processor you have. It was a thing of beauty.