Google Apps for Education (Via Teach42.) Here is Steve Dembo noting the new Google Apps in Education service. From the Google page:
Sharing information and ideas is vital to learning. So imagine how valuable it would be if your entire campus community shared a set of powerful, easy-to-use and integrated communication and collaboration services. With Google Apps for Education, you can offer all of your students innovative email, instant messaging, and calendaring, all for free.* You can select any combination of our available services (see below), and customize them with your school’s logo, color scheme and content. You can manage your users through an easy web-based console or use our available APIs to integrate the services into your existing systems — and it’s all hosted by Google, so there’s no hardware or software for you to install or maintain.