Hello Haskellers!

I have developed a very simple logging library to be extendable and easy-to-use. You can see the current release at http://hackage.haskell.org/package/hlogger/. The SimpleHLogger module is an example of what a HLogger implementation could look like. It could be used like this:

import System.Log.SimpleHLogger

main = do

  logger <- simpleLogger "test"

  loggerLog logger (Just ("LoggerTest", "main")) Debug "Test"

  loggerStop logger

As I have now implemented everything that I could think of, I would like to ask the Haskell community to give some feedback on HLogger so that I can continuing improving it. Some questions:

Do you have any general/architectural thoughts on things I might be doing wrong?
Is the ease-of-use goal contradicting making this library useful in more complex applications?
Do I want to redesign HLogger to allow loggers to have a mutable state, and if so, how can I do that?
Is there a nice way to provide the module and the function than using (Just ("LoggerTest, "main)) (shortening it somehow, I guess)?

Thanks!

Warm regards,
Jon Kristensen