Learning Management in the Classroom

I was wondering what, if any learning management systems people used.  Do you use these to communicate with your students? Create lessons? Share files? Grade posting? Group work? Forums?

Moodle vs Blackboard

Both inside the classroom and for fully online courses, I have switched from Blackboard to Moodle. It is far more intuitive, and displays better in a classroom. The more I use it, the more I want to put in it. But, as with all CMSs, I am careful to create all content outside it in text files, so when the next best thing comes along, I can move! :-)