Have you thought about offering online office hours?

Adobe Connect -- referred to as UMConnect at the U of M (formerly Macromedia Breeze) -- is a web conferencing and data collaboration tool. It provides you with a virtual meeting/classroom environment for sharing your presentations, images, and desktop applications with remote participants. You can also take advantage of features like a digital whiteboard, text chat, polling, and audio/video broadcasting. To attend your web meeting, your students need only a Web browser with the Flash plugin (almost all computers have this already) and a broadband Internet connection.

Here's a link to an informative and idea-generating video that was created at Purdue University. Faculty describe their use of Adobe Connect.
http://streamer.ics.purdue.edu/koshea/adobe_connect.wmv

If you'd like to get started with UMConnect, please visit:
http://umconnect-support.umn.edu/