A really, really cool feature of Qualtrics that is not well-documented is its web service. If you're not familiar with Qualtrics web service, it basically allows you to bring in dynamic content from an external website. For example, names, prices, etc. An example of this is Qualtrics' own random number generator: http://reporting.qualtrics.com/projects/randomNumGen.php. It creates random values that you can then insert into embedded data fields for use in your survey instrument.