Project page:
http://code.google.com/p/minlog/
Comments, criticism, questions, let me have it. 
MinLog aims for the simplest possible logging solution. It has a somewhat unique feature in that you can use one of the “fixed logging level” JARs to compile your application and javac will remove all logging statements below the fixed level. It doesn’t get more efficient than that!
Normally when I need logging I stick the same little Log class in my project and go to town. Now that I have a few projects that all need logging and are meant to be used together, I thought it would be annoying to configure multiple Log classes if a user wanted to redirect logging or change the logging level.
I’m pretty happy with how MinLog turned out and I think it is ideal for games, where you want lightweight logging and probably even want all the logging removed for deployment.