I really don't see where most on this thread are coming from - the US dollar has been gaining ground on most major currencies for about the last six months.
Pound:

Euro:
Baht:
Kind of funny 'cause it (the dollar) was takin' a beating for awhile - not so right now. I think peole jumped out of the dollar and into the pound, and the euro - took a look around, and found out the dollar was not such a bad deal after all - now they all are returning to the dollar.
When the world economy starts to slide - folks jump on the dollar - not out of it.
I think the above trends - for the dollar to rise to continue - especially if the world economic picture gets worse.