My contact in Italy, Nicola Losito, sent me a note about a web site called iusethis that I had almost forgotten about. After registering at the site ( it supports OpenID, Yeah!! ) you can create a list of the applications you use on your mac. Ok... great...but why? I'll let them tell you.
You can store the apps you use on iusethis, so it's easy to download them again if you get a new computer. You will also be able to help others pick the best apps, and we can suggest new apps to you based on your profile..