Did you try the www.hotelhustle.com link in the post you were replying to? That site calculates the cpp on each of the results from your search! (It shows the cash cost, the points cost, and the calculated cpp. It also shows the points + cash cost in some programs when available, but there's no sane unambiguous way to compute cpp for those, of course; you just have to use common sense to know when they're a good value.)