Nikon tonight unveiled a long-awaited update to its entry digital SLRs with the D5000. The camera claims a pair of firsts: it stands as the first Nikon DSLR of any type to use a swivel LCD and can use it to either provide settings or a new live view mode to compose shots from off-angle. Video is also new to the class and, as with the D90, lets photographers record 720p video with sound that can
