I know I have posted about this before. It has been something I have been folling over the years. But the AMR2 project finally has a demo of the first zone of Metroid 2 (one of my all time favorite games, even if it was on Gameboy). Check it out. Also, check out the AMR2 confrontation demo from earlier this year.
This is a solo project done by a fan over the last few years, and holy crap is it turning out awesome.