I'm not informed enough to judge whether the gold standard is a fundamentally good idea or not
Here's Krugman's tale of the babysitting co-op, a nice illustration of how and why manipulation of the money supply is useful. A gold standard prevents such manipulation, short of changing the gold exchange rate, digging up gold, or locking it away in a fortress.
Now you're informed.
I don't completely understand that story. Why didn't they start babysitting for half a coupon?
Tangential, but a subject of some local interest:
Why Bitcoin will fail by Avery Pennarun. "The sky isn't red." Thesis:
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:
The actual text contains many more caveats than the eye-catching selection of points above.