Twice this week I have received emails from friends or family that were forwarded from another source, and made a claim that seemed somewhat suspicious to me. In one case, the person said, "I don't know if this is even true, but I thought I would pass it along anyway."
I have found a most useful website: TruthOrFiction.com (and added it to my links on the left).
It's a neat little site that works well for all sorts of hoax-busting, especially of the forwarded email variety. Check it out.