Comment try before you buy... (Score 2, Interesting) 80
put it in there! for employers, this is a further chance to "try before you buy" - they get to see some projects that you've worked on, rathern than just hear about them.
I contribute to several projects, and have details of these on my CV. At every single interview, without exception, I have been asked more details about the Open Source projects that I work on. All have been intrigued to learn more.
At the end of the day, it is something that will make you well remembered and stick in an employers mind, which is going to make it much more likely that you will get an interview, or the job.