Minilog was driving me crazy for log levels (which I agree are not used here). 

Also, I would like the ability to separate turtle logs, server logs, test logs. A bit like Maven does.

Maven logs were a pain to find (dug in some /target or /out, I don't remember well) but they were very clear and encapsulated for each test. It was a breeze to debug.

Ideally I would like the logs to be accessible through a web interface.