One of the great tools that we have to use here at Sparta is SharePoint Services by Microsoft. If you have never used SharePoint (or a Learn Site as it is known around here), here is a great video to explain the what it is and why it can be such a great tool in an educational setting.
Paul and I have used SharePoint with our classes the past couple of years and it has changed the way we teach. Students can upload assignments to their own document library. Once there, they can link it to a Wiki page to showcase and receive feedback from other students or log in in from home to finish their work. SharePoint also offers calendar, blog, discussion, and Web page features. It is a great tool for collaboration. Our Intro classes and my Desktop Publishing classes have been able to go paperless. One of the things we like about it is that you can do all of this on the Web, but people who don't have access to our network can't access our student's information.
If you are interested in having a SharePoint site set up for your classroom, let Paul or myself know and we will make it happen.