I don't have cable and I'm glad because the only thing that's worth it is The Daily Show/Colbert Report, and some special cable channels that I wouldn't be able to afford anyway.
At least a couple years ago, there was a satellite channel that reran Daria...I can't remember what it's called though.
Yes, MTV Japan and SpaceShower are both oodles better. Given his comment at the VMA, I think Justin Timberlake should take over MTV!