Mikael, your UML diagram really gave me some good idea
Daklu,
Lapdog library is very useful.
Sequencer lib example provided more insights on OOP programming.Your threads are very useful for a OOP novice like me.
However in Seq library , it appears more importance is given to the handling of messages rather than the tests to be done.A new developer will little knowledge in OOP (like me ) would find it hard to debug.