According to a recent filing with the SEC, Barnes and Noble is planning to launch a new eReader later this month. During a meeting with analysts and investors, the big-box and online bookstore said “it expects to make an announcement on May 24, 2011 regarding the launch of a new eReader device.” It’s unclear if the new eReader will carry the NOOK moniker, but if Barnes & Noble is reworking the Nook Color – already powered by Android – we suspect it will have more powerful hardware and perhaps Android 3.0, which is designed for tablets. Late last year, Barnes & Noble went on the record saying that since the introduction of its NOOK eReaders, it began selling more digital books than physical books. With an even more robust device, B&N may be able to break into the tablet market, too.