Just a heads up on some code that might be useful to people: https://github.com/Mahoney/lidalia-logging It's a couple of appenders I've found useful - basically a model for decorating other appenders (by extending DecoratingAppender) together with a couple of examples, one that cleanses Groovy stack traces so you don't get all the useless frames and one that makes any appender asynchronous with a configurable number of threads used. There's an example logback.xml showing how to use them: https://github.com/Mahoney/lidalia-logging/blob/master/src/main/resources/lo... At some point I might try and release this as a library via Maven, but in the meantime if anyone finds them useful go ahead, and Ceki if you fancy them for Logback. Equally if anyone has any pointers (e.g. have I reinvented the wheel?) do let me know. Rob