Braukaiser.com is a wiki style website that is full of advanced home brewing knowledge. While it uses the wiki engin to display the site the work is all by Kai Troiser. Kai is a German who I believe now lives in America, he has written on many subjects for the advanced home brewer and also as appeared on Basic Brewing radio. I use his brewing log that he has published on his site to record by brewing and have always found his writing be interesting and helpful.
Rurik