A couple links that are primarily pictures are provide below. Shimano has been testing the group in the pro peleton for the last couple of years and they appear to be getting close. The latest reports have the electronic group inclusive of the batteries weighing less than the current components. One of the time trial bikes at the tour was outfitted with it. It was uber-clean with just 2 little buttons on the end of each aerobar it added about 5 mm to the length of the bar see the first link below
http://tour-de-france.velonews.com/a...nic-time-trial
http://velonews.com/article/72308
http://www.roadcyclinguk.com/news/ar...N/2490/v/1/sp/
http://www.cyclingnews.com/tech.php?...006/news/03-14