Here are a few links to reviews or lists of iPad applications. The iPad is an extremely versatile device - it can act as a business / productivity tool for email, calendaring, to-do lists; but also take on the role of a media device - playing video, displaying photos, slide shows, etc.; and it can be a musical instrument, a tutor for many topics, a foreign language translator and much, much more. Check out these links to get an idea of the kinds of applications you might find of interest on an iPad:
Review of iPad applications from Educational Origami: http://edorigami.edublogs.org/2010/12/22/on-the-wire-ipad-away/
List of iPad Tips and Tricks from How to Geek: http://www.howtogeek.com/howto/14529/the-complete-list-of-ipad-tips-tricks-and-tutorials/
EWU Wiki posting regarding iPads: http://wiki.ewu.edu/oit/EWU_E-Learning:_Getting_Started_with_an_iPad
