"Ghoul A Go-Go" has been a shimmering gem in the MNN line-up for quite some time now. Billed as a "monster kiddie musical show," this monthly series sees ogres and toddlers dancing it up in black-and-white to campy 1950s fright rock. An instant upper, as silly as it is captivating, "Ghoul" airs on the third Thursday of every month at 9 PM on MNN2. Less