I have also been messing around with game programming recently. It is a fun and interesting challenge, and allows me to expand my programming skills.
This is fortunate for me, since the 8/16-bit era is about on par with my own game programming abilities.
Same with me. I have been working on a tile-based 2d side-scroller using C# and XNA. I don't have any real plan for the game - I have just been messing around with different ideas. I have the collision detection and movement working, now I just need to turn it into a game.
If anybody here wants to help by drawing some sprites, then you may volunteer, and I'll provide details.
I'm not much of an artists, so creating sprites is a big challenge for me, more so than the programming. I have been messing around with GIMP and reading tutorials in an effort to get better.
Good luck with your game!