Within a couple weeks, this is going to need curated categorization of products. At the highest level, I'd categorize as: a. physical product b. installed softw

Within a couple weeks, this is going to need curated categorization of products. At the highest level, I'd categorize as: a. physical product b. installed software product c. web service product d. hybrid software+service product Could be even broader. Or use tagging. You probably wouldn't look in the above categories for performance events, dining out, or phone sex. Must decide how wide a net you wish to cast, and what ontological approaches to use. But this, in my opinion, is where it gets interesting.