Well, it’s a bit up in the air at the minute, but it looks like they’re all going to be popped through the #testers category. 
If that’s the case, then a new topic will pop up with the items in and you reply with the ones you’d like to test (including size for lingerie). Then Brenna will match up the items to people from that list, send them an email, and post out the stuff. 
You can also set the #testers category to ‘Watching First Post’, which means you get a notification every time a new Tester Topic goes live. You can find out more in Notifications