The chiptune scene mostly sucks, in my opinion. Chiptuners treat it like modern rock and/or trance, just with chip hardware, and it ends up sucking.
The best chiptune artists are those who take note of the amazing soundtracks from oldschool consoles back in the day. Guys like Jake "virt" Kaufman are 100x better than any chiptune "artist" out there.
The most interesting thing about writing chiptune, for me, is LIMITING yourself. The few chiptunes that I have written, I've used NES 8-bit limitations for each one - that is, 3 channels max, meaning you never have more than 3 notes playing at any one given moment. The composition process changes a lot with these kind of limits. Your music HAS to be good because it can't rely on amazing synths, massive orchestras, or killer production values. Some pure genius tracks have come out of these limitations.
Anyway, here's one of my own chiptunes here on NG. I write mostly orchestral stuff, but enjoy this, my contribution to chiptunage: