Rusty Humphries (who is on the same network as Savage) has been vocal in support of the Birthers, and has called out those (like Beck, Levin, Hannity) who refuse to cover the Birther story.
Probably the two talk radio hosts who have been most supportive of the Birther issue are Humphries and Bill Cunningham, IMO
And Savage
There's a reason for that. Info at this link: http://homelandsecurityus.com/?p=2966
And interview links at this post by Hypo.