There are several that I anxiously await (as weird as that sounds) including one that arrived via email just a few minutes ago.
My Fishing Bud Dave Fremlin sends a unique email card.

For those who don't know Frem, he's easily one of the nicest guys on the planet. In the top 2 or 3 funniest people I've ever met, and has perhaps the coolest job of anyone I know.
He also plays the pipes... something that he did with great distinction at my wedding and added realism to his portrayal of the infamous "Drunkin Piper" in Men with Brooms.