Welcome to Linux Mint autocrosser. We are pleased to have a new member with a strong Linux/Ubuntu background. If you check the Community Website at http://community.linuxmint.com/
you'll find a list of the members of the Testing Team. I'm not sure if you need to contact Clem directly or one of the testers to find out if they are seeking additional team members. You'll find that some of them frequent the Mint IRC channels, which you can access by starting XChat in your main menu under internet. Upon starting, XChat will take you directly there. Have fun with Mint.