Here's something nice to watch if you have some time left this weekend. Roger did some alien head modeling in about 35 minutes, recorded it all and plays it back at twice the speed.
I personally enjoy the eye modeling most, I guess because this is the most realistic part of the model. This video isn't going to teach you any Blender techniques (it's way too fast for that), but it does show a few good basic techniques for organic/face modeling. Watch, and pay attention!
Note: In case you didn't know yet, you can also download these videos from the Google Video page (look for the 'Download' button) as MP4, but you can also download the Flash movie file (*.flv) using a cool little service I found today called VideoDL. (You can play .flv files with VLC).