Welcome to wiki.pcprobleemloos.nl!
Although not technically "wiki's", here are some articles I wrote on various subjects.
Using lxc LinuX Containers on Debian 'Squeeze' - by Sebastiaan Giebels
My FreeBSD Installation and Configuration Guide - by Sebastiaan Giebels
My Asterisk PBX installation and configuration guide - by Sebastiaan Giebels
My Debian Linux on the NSLU2 installation and configuration guide - by Sebastiaan Giebels