Gaps on LeTour website A fun visual resourse. It is slightly delayed, but everyday you will be able to tell who is where, in which pack and the time delays instantly in one easy view. Pull it up daily for a quick reference. (no need to refresh).
CyclingNews live reports for very live news about what is happening everywhere on the course. Who, what, where use this classic news ticker. You'll need to scroll the page for older news. (page automatically refreshes).
When I get confused on the TV coverage when the camera changes from one group to the next, these resources help clarify the riders positions on the road.