Shoot, well I don't think it happens too often. Can you repeat the gist of your comments?
Oh, I just wanted to add that if you are trying to represent database rows as a hierarchy, then it is useful to have this reproduced in the url. But for a lot of applications, the magic-number idea is very useful.
Don, how does this work exactly? For instance tinyurl.com uses a database to reverse the map. Kind of expensive, but very useful, since you need some tiny string.
