Yeah I got a similar letter. I have a high score as well and am never late, etc, etc.
These banks and CC companies are really going to hurt themselves more than help themselves in the long term...imo. Once the economy comes back around I will get rid off any and all cards except one and use only Debit and cash. They want to screw us while we are down to help them why they are down, that is just the wrong way to do business. I left the US BofA Visa a while back because of this as well.