Dear Mr. Newdow...

Please... Go fuck yourself.

If you're so against the usage of "under God" in the pledge of allegiance, please turn in all of your assets and possessions that were ever obtained using currency bearing the term "In God We Trust."

You can send them to these folks.

Here's a quick history lesson:
This country was primarily founded by religious rejects from Europe, not atheists. Many aspects of American society defer to and offer respect to Deity. So go and find a worthwhile crusade and leave the rest of us out of your emotional or spiritual inadequacies. Please...