I have long been a fan of the chiptune/8-bit music scene. YMCK somehow stands out however; they are really perfecting a different sound than most chiptune artists and this has some possibility of breaking out beyond the super-subculture.
That and they are putting out the most stunning 8bit music videos I have ever seen. The video for 'Starlight' is absolutely breathtaking:
I just purchased their newest album, 'Family Genesis', and it is absolutely fantastic. One of my favorite tracks, which is the track that turned me on to them when I heard it at Muzak for Cybernetics, is Future Invasion. Click that title to sample it yourself, it is a good one.
If anyone knows any other great chiptune acts that would be a sin to pass over, please leave a comment. :D