Ah yes, the resignation letter. Properly crafted, an act of thankfulness, dignity and perhaps most importantly - full of language that doesn't cause the the proverbial "bridge" to combust into flames.
In other words - it takes the high road, and doesn't PO anyone.
"An opportunity I can't pass up has emerged" (I've felt chronically underpaid and underappreciated, and the grass is so green on that side it looks like AstroTurf);
"I'd like to thank those who have supported me in my time at BIG, Inc. (Of course, there's a lot of you who tried to stab me with the steely knife, and for you, I have nothing); and
"In the best interest of my family, I feel like I must accept this job" (It's not me, it's you).
It is possible to have fun with the resignation letter, as was the case with a recent exiting Silicon Valley executive, as reported in Valleywag. I love it when someone flips the technology switch and goes old school, taking us all the way through the industrial revolution as a means to say "I'm not core to the mission anymore".
Take a look below and have fun with it. From Valleywag: