Camtasia vs. Captivate
Meredith at Information Wants to be Free has a nice comparision of Camtasia and Captivate. She points out that these impressions are based on only a few days of work with each product, but I was impressed with her list of pros and cons for each product. For me, the list of cons with Camtasia is what turns me off - not enough flexibility in there IMHO...
