By now, consumers are quite used to the fact that most Target collaborations are heralded with the kind of fanfare that whips the fashion community into a froth prior to launch. Some like Missoni, lived up to their hype, generating a frenzy of sales for the Minneapolis-based retailer. Others, such as the assortment spawned from a partnership with Neiman Marcus, flopped. On May 5, a Sam & Libby footwear collection will make its debut, sans massive media splash but loaded with potential staying power.