last month somebody was selling a MCP40 on eBay, and on an impulse decided to buy it (I had one back in the days, always missed it, and I needed more of red and black stuff).
I also managed to source some new pens (and replacement gears for the mechanism), and on Friday since I had not prepared any prod for the party I decided to give a shot at coding a small something for it on the party place.
You can get it here:
YouTube
Pouet
The source code is actually on the Pouet page, just click on the NFO link on the top right.
Hope you like it

@Xeron: How difficult would it be to add a secondary window to Oricutron where we could "write" the actual output a printer? I'm willing to try to make a MCP40 renderer for it, I just need the base support. Also means we could have a practical way to output and visual information while it happens - like profile or debugging information!