Canon has released three EF lenses, including an updated 24-70mm F2.8 II USM. The latest version features what is promised to be a more durable body, despite being a little smaller. In addition to this high-end full-frame standard zoom, there are completely redesigned semi-fast 24mm  and 28mm F2.8 primes, both of which feature USM focus motors and image stabilization. (source from www.dpreview.com)

Read more here …
http://www.dpreview.com/news/2012/02/07/Canon_24-70mm_F2p8_II_24mm_f2p8_IS_28mm_f2p8_IS