Tangential, but a subject of some local interest:

Why Bitcoin will fail by Avery Pennarun. "The sky isn't red." Thesis:

1. The gold standard was a bad idea.
2. Even if it [Bitcoin] was a good idea, governments will squash it.
3. The whole technological basis (cryptosystem) is flawed.
4. It doesn't work offline.

I'm not sure I buy these and am not competent to evaluate his claims on 3., but would like others' critique.

L019: Bitcoin P2P Currency: The Most Dangerous Project We've Ever Seen by Jason Calacanis. A rather more enthusiastic viewpoint of the project:

1. Bitcoin is a technologically sound project.
2. Bitcoin is unstoppable without end-user prosecution.
3. Bitcoin is the most dangerous open-source project ever created.
4. Bitcoin may be the most dangerous technological project since the internet itself.
5. Bitcoin is a political statement by technological libertarians.
6. Bitcoins will change the world unless governments ban them with harsh penalties.

The actual text contains many more caveats than the eye-catching selection of points above.