I’ve previously addressed the “non-citizen smear”, but as a public service here is a summary for the benefit of anyone who may still doubt the
eligibility of Barack Obama for President according to the Constitution:

• the Obama campaign has already posted a copy of Obama’s birth certificate on his campaign website
• Snopes.com debunks the “non-citizen smear”
• FactCheck.org actually saw the original birth certificate

Do share this post with anyone who is irrational enough to believe the non-citizen smear, but rational enough to be convinced otherwise by solid evidence. Don’t bother sending the link to people who fail the second criteria, you’ll be wasting Internet.