Have you heard yet about Sitters.com? You can find a sitter for your kids, your pets or your parents on this site, as well as a housekeeper or a tutor! There is a great interview here with St. Louis native Mike Cravens, CEO of Sitters.com.
Sign up in April and get ten free credits to the site. All you have to do is enter the promo code: FREEINAPRIL.