Chris Smith, of Shambles fame, has created a nursery rhyme blog, with entries leading to YouTube clips of various sorts, including Little Bo Peep in Lost and Found (from Sesame Street), the Nursery Rhyme Rap "Three Cool Mice" and the (utterly brilliant) Nursery Rhyme Concerto by Rick Wakeman.

See for yourself at http://nurseryrhymevideos.blogspot.com/.