Welcome back Emily ;)
As for becoming a tester, There is a thread about it but I cant link at the moment.
Basically, The jist of it is this...
Be an active forum'ee, Write plenty of reviews, Make sure you have your email address visible in your profile along with your address. Your address won't be visible to the public :),
And have an Orgasm Army Wishlist so you can add items you wish to review ;) Then keep an eye open for the tester threads ;) xx