To help offset the desire to hoarde, why not set up very inexpensive speculator projects, as has been suggested, to create new businesses and or support existing ones, for example a local farmers market, a local garage.
The Bitcoin Community could draw up a list of worthy causes or projects and people could pledge 1BTC per month to a project.
Maybe even set those businesses up with Bitcoin useability.
So by Pledging 12BTCs, per year, you could help fund 12different projects of your choosing.
Draw up a list of 100 or even 1000 worthy causes.
How about Bitcoiners pledging 1BTC per month or even per year for advertising Bitcoin or even setting up suitable small businesses to accept Bitcoin payments.
For example a local shop, or small business, maybe even a network of garages could be funded to accept Bitcoin and then offer discounts to people who pay using Bitcoin.