We just finished a little project where we were required to use the Silhouette Portrait (CNC paper/fabric cutter). Most folks tend to use it for crafts and scrapbooking but that skill is just not in my veins! So I decided to create paper tape/punch card and make a reader for it incorporating the Propeller BOE!
If you're interested, I've put the step by step of how I did it on: http://www.instructables.com/id/DIY-Paper-TapePunch-Card-Maker-and-Reader/
For the thought process/daily updates I made during the project: https://www.reddit.com/r/Tymkrs/comments/3e0bbo/using_the_silhouette_portrait_cutting_machine/
I think eventually we may make some sort of card reader system for the hackerspace and use it to give out points - 5 points for coming, 10000 for cleaning - all redeemable for little erasers and oriental trading pencils!
Hope you guys enjoy, and let me know if you have any questions!Addie
PS, not sure if this is the right forum for this, as I was going to place it into projects before it became robotics