There are other issues at stake here, issues closer to the American consumer's heart...
1) Our economy is balanced between massive investment coming in and a massive trade deficit. Money flowing into and out of the country must be balanced to zero so if one half fails, then so does the other.
2) This is related to exchange rates because your currency is a measure of the attractivness of your country as an investment. When we are talking investments we are looking at rate-of-return or interest rates. Deficits make a country unattractive and depress currency. Stability (which America usually has) makes it more attractive. Further, higher interest rates will bring foreign investors chasing higher returns. The US has had money pouring in because it was seen as the most stable, productive country in the world. People (countries) are willing to tolerate a hit on interest rates for this stability. They were financing our debt.
As the US deficit grew last year it called into focus the relative stability of the American market vs. Europe's. I believe Europe also had a better interest rate. As foreign investment in the US dried up, the demand for and consequently value of the dollar decreased. This leads to an increase in the cost of imports. There is then a necessary decrease in the trade imbalance.
The sticking point for consumers is related to interest rates. There is now the possibility of a currency crash. Other countries hold huge dollar assets that are declining in value. To cut their losses, they could try to sell. The value of the currency could spiral down. In order to attract more investment to finance our debt, we would have to increase the our interest rates. While other folks get better returns, it has the effect of damping our economy. This decreases the now rampant US consumerism and again corrects the trade deficit. It hurts normal people because the current housing boom is largely supported by low interest rates. Personal credit card debt is made more bearable by low interest rates.
So, it's too early for "good" or "bad". The current situation has been a long time coming and has its roots in American culture as well as recent events. Decreased imports means more domestic production but higher interest rates damp the economy. If we have luck, things will stay in relative balance and change slowly. If we're really unlucky, the world economy decends into chaos as our currency undergoes a third-world stlye crash.
Lucky me, I'm paid in Euros but run my accounts in the USA. Let the good times roll.
Grüß - Scott