I’ve received some schedule info about National Lampoon Radio Hour broadcasts on XM Satellite Radio. A new show is broadcast every Saturday (7-8 a.m. in the East, 4-5 a.m. in the West) and repeated on Monday (3-4 p.m. in the East, noon-1 p.m. in the West) and Wednesday (midnight-1 a.m. in the East, 9-10 p.m. in the West).
XM’s competitor in the digital satellite radio biz, Sirius Radio, also broadcasts National Lampoon Radio Hour shows on their “Sirius Comedy” channel 160, but I don’t have any other information about them at this time.