Well, I tried just now to register at Paul McCartney's official web site, http://www.paulmccartney.com/main.php, just to wish him a happy 64th birthday. Corny, I know. There's just something irresistible about this once in a lifetime opportunity.
However, they have a very convoluted system that failed during the process. It created an account for me but won't let me use it. Oh well, I guess the chances of his reading my birthday greetings were pretty slim. Like one in several million.