Nikon has announced the D3200 24MP entry-level DSLR that can be used with an optional WU-1a Wi-Fi module. The camera can now shoot up to 1080p30 video (rather than the D3100's 24p) and has a 920k dot LCD, up from 230k dots. Beyond this, and improved continuous shoot rate despite the pixel-count hike, the biggest change is the …