Speed Channel survives only because of NASCAR, which I'd watch after my eyes had been removed & brain flattened. But, I'll watch MotoGP every chance I get, because reading about MotoGP is like singing about lunch.
AMA racing is great in person, but TV coverage is lame. The Dakar Rally coverage used to be on Vs. (OLN), complete with the British broadcast & Toby Moody, but we'll see if they carry the South American reinvention of it next January. Compared to nothing, speed channel coverage of MotoGP is fine - I hope Fox or NBC doesn't muck up the Lguna or Indy MotoGP race broadcasts (again).