Nikon MB-D15 battery grip for D7100 is now shipping in the US and is currently in stock at B&H.
The Nikon Coolpix A will start shipping today or tomorrow - it is already en route to retailers. This is the final product release from the recent series of Nikon announcements. I expect the next few months to be quiet in terms of new product announcements. The rumor mill will probably heat up again during the summer.