Latest Flipboard App 1 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 2.3.4; en-us; NOOK BNTV250A Build/GINGERBREAD 1.4.3) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 Flipboard/1.9.19/283,1.9.19.283,2013-01-11 20:13, -0500, us Android 2 Nook BNTV250A
Mozilla/5.0 (Linux; U; Android 2.3.4; en-us; NOOK BNTV250 Build/GINGERBREAD 1.4.3) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 Flipboard/1.9.19/283,1.9.19.283,2013-01-11 20:13, -0600, us Android 2 Nook BNTV250
Mozilla/5.0 (Linux; U; Android 2.3.4; en-us; NOOK BNTV250 Build/GINGERBREAD 1.4.3) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 Flipboard/1.9.19/283,1.9.19.283,2013-01-11 20:13, -0500, us Android 2 Nook BNTV250
Mozilla/5.0 (Linux; U; Android 2.3.4; en-us; NOOK BNTV250 Build/GINGERBREAD 1.4.3) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 Flipboard/1.8.4/101,1.8.4.101,2012-06-22 01:57, us Android 2 Nook BNTV250