-Podcasting: increasingly universities offer podcast of courses to their students. Back in undergrad there was always the odd student bringing in a voice recorder to class, and the infamous live video feed where you could watch Carleton classes on TV. But podcasting makes the whole thing more efficient and more convenient. Some profs have gone even further. Dr. B for example encouraged his students to make their own podcast, and would answer questions he received by email on his own podcast. Ben at the university of Chicago school of medicine has started a podcast about admission to med school and student orientation.
-Blogging: Blogging is a great way to add some extra information on the side for your classes. But more and more teachers, such as PZ myers from Pharyngula and Dr B from biological obsessions have brought it a step further by encouraging students to blog. In fact Dr B awards a mark based on what the students blog about on the official course blogs (microbiology) here and (evolution) here. It may sound strange but in fact blogging encourages the student to assimilate science information, be critical and learn to communicate ideas, all of which are necessary to be a good scientist.
-Social networking: Lets face it, most young adults are on facebook, even those that are not too web-saavy. So why not go to them to reach out. Making a group on facebook like Dr. B did for his class is a genius idea in my opinion. For one, most people check facecrack often, often multiple times a day. Updates are hence highly visible. It's a great place to post anything, simply for the visibility it can get. Facebook is not just about keeping in touch with friends anymore, it's become a virtual gathering place, so why not have a virtual classroom?
Any other ideas?