Apple recently cited a handful of iPad-friendly Web sites — a small list that includes CNN, Reuters, the New York Times, Vimeo and the White House. With the iPad buzz having reached dizzying heights, it is safe to assume that most everyone who has a Web site is at least thinking about how to render it iPad-friendly as well. It may be surprising to some that it can be done in one afternoon, depending on the complexity of the site. However, if a site requires significant investment to retool it for the iPad, it might be a good idea to wait a while.