I’m a gadget freak, and I’m starting to see the need to start some sort of inventory management system. For example, I just purchased a Logitech Harmony remote – and I’m thinking it would be great to have either some website and/or software application where I can catalog things like part numbers, serial numbers, contact numbers, model numbers, date of purchase, etc. Does anyone know of such a thing?

You can give inFlow Inventory a try. They have a Free version that is free forever, but limits to 100 products and customers. The software itself is very easy to use and fast to install.
Here is their website:http://www.inflowinventory.com
Hope this helps!