To get to a realistic number like 10,000 you need more than just flippers and hoarders. We need a VC firm to step up and start financing things that will require stupid capital (because of regulations and compliance) to get BTC used in the mainstream. POS terminals is the best idea (until visa/mc lobby you to death which is why someone has to build something and then get serious VC money). I am trying to put together some stuff but it costs a lot and it is a balance between hoarding coins and financing things that help your hoard go up.
Yep, 10,000 will require serious development - good luck to you, and let's hope BFL pulls through alright. To be fair, part of my complaint against them is due to the insane bull run - not something in their control.