Updated
When it says "501st Member" or "501st Stormtrooper" under your picture, like it does now You'll also be able to see the racing shirt thread in the detachment merch area where you couldn't before you were approved.
You have access on OUR site, so you can view the detachment forums here. I have no control over the legion boards so your pending status on the 501st Legion site won't change until election time when they cross-reference the detachment sites where people are approved members.