I used some of the blue stamps on an envelope to Eric that was made from the cover of US Philatelic magazine. I think they are slightly less bright in real life compared to the USPS image.
The stamp has also been issued in a red version. There has been some discussion as to whether there will be confusion considering the fact that the stamps say 'airmail', when they are in fact 'forever' stamps valid for first class domestic mail.
For more postage with an A theme, head over to the links at Sunday Stamps.