I recently ended up in a bit of a mess on one of the projects I work on, a "mélange" of Log4j, Slf4j and Commons-Logging due to mixing different JARs from different open source projects.
I see more and more OS projects slowly moving to Slf4j. Logback seems to be the successor of Log4j. I think it's actually a fork, but since no further development are anticipated for Log4j 1.3 and Log4j 2.0 is an experimental development and don't know if it will ever leave that state... I wonder!!!
Is Log4j dead?