[FYI: I'm also a huge fan of the work of Neil Van Neikirk, whose detailed blog also provides a lot of help in the off-camera flash area]
I had the ability to use some off-camera flash extensively with a couple of shoots that I did recently. First up is local musician Grace Van't Hof, who plays a pretty mean banjo. I went over to Grace's very-interesting-looking house and we did a lot of profile-style shots as well as some more interesting poses.
In addition, I worked with a classmate recently, Amanda, to produce shots for use in her online portfolio and website. These are almost all exclusively done using off-camera flash and shoot-through umbrellas (Lumopro 160s fired through Westcott 43" umbrellas).