I have released mysql-query-builder 1.0.2. Still lacks formal documentation, but 100% covered by unit-tests which can be treated as such.

MySQL Query Builder is a set of PHP5 Classes which can… (surprise!) build correct MySQL5 queries for use with PDO’s prepare/execute. This things rocks really hard if you need to implement some kind of database layer (I implemented ActiveRecord this way) in your app and building queries in dynamics.