Lately they have been sending e-mail notification to members stating that they are selected to test a product there is usually a web address within the e-mail for you to click on and submit a review..  if you recieved such a e-mail I'd look there..

There is also a new section on the BB Tests & Reviews they may have sent a product that is listed on the web site on the drop down there is a tap called online reviews click on there and see if the product you got to test is online follow the directions to submitting an online review if you don't see it on the first page just to the right under the mossy oak add there are more products by catagory

Hope this helps