Last June, Amazon announced a clothes-by-mail service so Prime customers could try out new apparel without committing to buying it ahead of time. The service has been in beta ever since, but TechCrunch reports that it has now reached more customers. A number of people have tweeted that they have received an invitation to try Prime Wardrobe and an Amazon employee tweeted that the service had officially launched -- though that tweet has since been deleted. Additionally, the Twitter account for the University of California, Irvine's Prime Student Brand Ambassadors encouraged students to try out Prime Wardrobe in a tweet posted yesterday.