MichaelMeissner:
The triggertrap company which sells a shutter release system based on the Arduino has recently updated their firmware, and they have a system that doesn't need the Arduino stuff loaded on the target computer. https://triggertrap.com/easily-update-your-triggertrap-firmware/For Linux they recommend Cowascript, which was posted to these forums in April (you do need to install avrdude): Arduino Forum.
Reading the user's comments on that linked page, it doesn't sound like it was as easy and effective as one might hope, or perhaps that was just early bugs and/or users not able to follow instructions well?
Lefty