I love this! But, there needs to be some sort of category and search functionality. For instance, if I wanted to buy a homemade headphone amplifier, how would

I love this! But, there needs to be some sort of category and search functionality. For instance, if I wanted to buy a homemade headphone amplifier, how would I find it? Right now all the electronics are just on a list sorted by... I don't even know. This system is not going to work as more gadgets get added and the site grows.