An Avid dongle USB keyhttp://www.savethedongle.com is a site hosting a petition to save Avid's dongle-based authentication for the users who rely on being able to transfer their license from one machine to another in the course of their work.
They seek to give the user an option - to follow the software-based authentication proposed for MC 3.5 and not have to worry about losing their dongle and having to buy a brand new system if they lose it, and/ or keep their dongle for authentication.
Plus, you know, it's called a dongle. We can't let go of that.
See their website for more information and for the petition.