Mattel has recalled nearly one million Fisher-Price toys representing various Nickelodeon and Sesame Street characters due to potential lead poisoning from the surface paints. You can check to see if you have any of the toys at either the Mattel or CPSC sites. The Mattel site has pictures of all recalled toys. It appears that they are only recalling toys purchased after May 1, 2007. The link for contacting them to receive a prepaid label to return a product appears to be broken (or may just be overwhelmed) as I write this. You can call Fisher-Price at (800) 916-4498.
Hat tip: GoodyBlog.