I played around with Camtasia Studio some more today. In fact--for six hours! I was supposed to meet a friend to work out at the gym, and completely spaced. (Uh, huh....)
This is the intro to a longer tutorial on web searching strategies. CS links with Power Point, allowing you to record and narrate your PP slides, then add call outs and other effects in the editing stage. I'm fairly pleased with this one. And I must stay, I'm really loving this software!
I also found an excellent Missing Manual-type how to guide here.