I don't usually post about Amex offers, since other blogs usually send out the bat signal as soon as any good offers become available. However, I found this offer on one of my cards today, and a quick search didn't show any other blogs covering it yet.
This was on a card I don't check very often, so maybe this is old news? The expiration date is pretty soon, which suggests it may have been around for a while. In any case, check your Amex cards for this one... $20 at any small business should be pretty easy, and 1000 points is a fantastic bonus for such a small spending commitment.