+1 to Ta0kira for his flurry of non-syndicated posts. My nitpick would be that sometimes the syndicated posts are OT.
+1 to Apenwarr. Yeah baby, long live hand rolled lexers and parsers! (That brought back fond memories of my university days taking Compiler Design.)
-1 but self::patOnTheBack() for fixing the language and country detection bugs in Piwik. Boo-hiss-scratch for whoever was responsible for using the proposed ISO 3166-1 alpha-2 country code "sp" instead of waiting for the officially assigned "rs" for Serbia. A hex on you and your bloodline that I have to detect "sr-sp" in every visitor's browser's Accepted-Language and fix your mistake.