We caught our first glimpses of the Sling Monitor 150 placeshifting display at CES 2009, but it only got an official launch at this year's show, and now it looks like it's getting even closer to store shelves with an appearance at the FCC for some RF testing action. We've always been intrigued by the 15-inch 720p display that can stream HD over WiFi, but until a cable or satellite operator actually deploys some of those hot SlingLoaded set-top boxes this thing isn't going to do anyone too much good.