The current multi-sig solution we are building is based on a per transaction balance. So: 1. Buyer selects the product(s) they want and adds to cart as usual 2. Upon checkout, the order is totaled for them and a wallet address is provided in which to deposit that amount. 3. The buyer is given key 1, the vendor is given key 2, and Silk Road has key 3. (2 of 3) 4. The keys can be made available if either party wishes so that if we vanish off the face of the planet, their money is still safe. This is just a general overview of our model as it has been explained to me by the devs, but the main idea is a user-friendly experience where multi-sig is almost transparent to the end-user.