I’ve been working on a Web-based inventory application called anyInventory for the last week or so that was inspired by this Slashdot thread. It has gotten to the point where I could release version 0.1 (or whatever). If you’d like to help test it out or would be willing to read through the help and documentation files and comment on them, e-mail me at email@example.com. I’ll be releasing it officially in a few days.
Update: I am no longer involved in the development of anyInventory.