With Lion soon to be here, a useful link was posted on one of the Mac lists. I must apologize for not remembering from what list this came or by whom it was posted, as I was away for a few days and went through about 1400 email messages upon my return.
Nevertheless, here is a page that has a list of applications and whether or not they are ready for Lion. It is probably best to have only the incompatible applications shown to make things easier, but you can find the complete list