An interesting, but not unsurprising article in Cycling News suggesting that Cavendish will leave Sky at the end of the season. I think others on here commented that Sky was not a good fit for Cavendish when he joined at the end of last year.
http://www.cyclingnews.com/news/cavendish-to-omega-pharma-quick-step
http://www.cyclingnews.com/news/cavendish-to-omega-pharma-quick-step