My favorite radio station WFMU (91.1 FM, New Jersey) has a weekly kids show called Greasy Kid Stuff. It's noncommercial listener-supported radio. They stream live from wfmu.org every Saturday 10am-12pm EST and have archives online. (
http://www.wfmu.org/gks/) Recently they cut a CD compilation:
http://www.confidentialrecordings.com/shop_gks.html