It's a chiptune media sharing/community site. Very clean design and everything on there is Creative Commons licensed (so you can use stuff from there in your non-commercial podcasts, videos, presentations, and so on). There are some really good tracks on there too (and some crap, naturally).
And for NES specifically check out The Advantage Band. Two guitars, bass, and drums covering NES songs perfectly. They released two albums on 5RC and toured a few times but they haven't been active for a couple years. Here's a little Contra "Alien's Lair & Boss Music":
The SMS and C64 were 8 bit systems, though too, solidly from the same generation as the NES. They don't strongly outclass the NES, just enough that the music is more enjoyable.
Compare Skate or Die on NES to the C64 version - the title song is so much more rockin'. Or any NES RPG to Phantasy Star or Ys for the SMS... the difference is profound.
It's a chiptune media sharing/community site. Very clean design and everything on there is Creative Commons licensed (so you can use stuff from there in your non-commercial podcasts, videos, presentations, and so on). There are some really good tracks on there too (and some crap, naturally).