I agree with you to a great extent, a currency must have some sort of stability for it to be truly valued. I honestly hope that bitcoins settle at a price in the near future my heart can't handle this much excitement every day.

If I was a some sort of vendor I wouldn't accept bitcoin at the moment unless they were immediately cashed simply because I'd fear selling a computer for $1500 worth of bitcoins then watch that fall potentially the next day.

When bitcoin stabilizes, the marketplace will be more and more willing to accept them as a payment option.