Is a cheaper dollar better?

[Woolygimp]

I've heard this said numerous times recently, and it's argued that a cheaper dollar will boost our export market with multinational US companies receiving full benefit. Won't this help to balance our problem of consuming more than we sell?

Anyway, I was wondering if anyone here believes that a falling USD index can be a good thing. Either way can you explain yourself, all this is fairly interesting and I'm new to it all.