l()

I am trying to get my head around the new l() function in drupal 6, l($text, $path, $options = array()), but I didn't understand the arguments after the $path argument in version 5 and I haven't been able to find a reference on api.drupal.org (or anywhere on the web for that matter)that explains the available indexes and values for the $options array.

Is there anyone out there that would be willing to write a short explanation describing how to use this array and listing the available values? Or if it has already been written perhaps you could enlighten me with a link.

Thanks