I assume there must be DVDProfiler-like software, or online lists that will let you maintain an inventory of all of your games. Any recommendations?

I'd be interested in something like this as well.

I just use IGN's profile. I don't need much from a collection manager, so it works.

I use IGN. It isn't perfect, but it gets the job done.

I don't use this one (but I have/like/recommend some of their other products) but there is http://www.wakefieldsoft.com/gamelist/ Even if you don't have a PDA to sync to the desktop apps are usually pretty good on their own.

I use GameSpot.

Ign

Excel.

I made my own with Mysql and PHP, because I'm weird like that. It is not just for games though. It can do CDs, DVDs, books, and anything else I want.

Ha, that's exactly what I did..

http://pixyjunket.aorange.com/collections.php

It.. hasn't been updated in some time I see.