I've come across some recent NES homebrew that's really good!
The first one is Blade Buster, which you can download here, http://hlc6502.web.fc2.com/Bbuster.htm
Another one is called Assimilate, get it here, http://filetrip.net/oldies-downloads/nes/download-assimilate-10-f30618.html
This one has some glitches but is still playable. It's called Neotoxin, the dl link is in the description on the YouTube page.
Sorry, I couldn't post another media file so I'll just supply the link. http://www.youtube.com/watch?v=AYy_J8cfcw4
And if anyone is interested, here's a site with a bunch of homebrew for the NES. http://www.nesworld.com/homebrew.php