The first exception I knew was Paul Halmos. Among other things, he became the single best salesman for my first book. As you may know, Paul will celebrate his 80th birthday on Sunday March 3rd. I am organizing an email blitz for the occasion, the idea being to deluge the old gent on that day with electronic birthday greetings from near and far. You are invited to join the fun.
Duplications are inevitable in any case, but that is no problem.
I suggest notifying people at least a week in advance of H-Day. People without access to email on a Sunday should wait until Monday the 4th to send their greetings.