What could Barnes & Noble have up their sleeve for May 24th? The retailer just sent out invitations to press for an event to be held in NYC, and it would seem a new device is headed to Nook lineup. Speculation is wavering between a beefed up NOOKcolor or a new version of the original Nook with eInk screen. Regardless, with the recent popularity the Nook has gained thanks to its tablet-like properties, we fully expect Android to be present for whatever the announcement is.