If we can find a "killer app" for bitcoins, a commodity that can only be bought through bitcoins, then we will have effectively ensured demand for bitcoins will remain at least as high as demand for that commodity. I hear the US uses oil for this purpose, though I haven't researched that claim at all. This commodity would, of course, have to be unique to our own "nation;" that is, our bitcoin community.
+1
This is exactly what I've been thinking. Paying in bitcoin for online resources makes alot of sense.
Also, this can also help secure bitcoin against propaganda "whitchunts" by the powers that be. I remember a great presentation at a conference I went to once, about Cute Kitten Activism, this was long before the Facebook revolutions. The presenter described their experiences with a photo posting site and how they knew they were functional when people posted kitten photos, they knew they could scale when people posted porn, and they knew they were in over their heads when activists were using them to organize and to document atrocities in real time. What they found was that the kittens made the site too politically costly for the network to block. Governments have gotten a bit bolder since, but it hasn't worked out well for them.
I like your idea, but we also need a "Cute Kitten" app, something so obviously popular and non-threatening that people will be as eager to join the Bitcoin economy as they are to spend their baby formula money to buy power-ups in a Zynga app.
http://imagepaste.nullnetwork.net/img/1299802637feel_teh_powerz_small.jpg