I'd like to open a discussion on how to implement inventory. After surveying a few other virtual worlds, the concept of user-owned inventory seems to be missing. Also, the marketplace seems to be vestigial in HF at the moment (please correct me if I'm wrong), and I think the concept of owning digital content should not be overlooked.
After some thought, I really still like the blockchain certificate concept from HF, but it would be nice if it could be pinned to something already in existence and in use. I would really like to see people able to buy from each other 1-to-1 and shop for and purchase online the way we purchase anything else, via paypal or some other merchant checkout.
For the concept of people running their own servers, it probably isn't too far a stretch to expect people to carry their own inventory as well. How to allow this and maintain creator protection is something I'd like to talk about more and put some ideas on the table.