The latest regarding Rob Van Dam is he is returning to TNA Impact Wrestling.
His current deal with TNA was believed to expire this month, however, it may have included an option for another year. While RVD had grown frustrated with the way he had been booked and was rumored to be considering another run with WWE in late 2011, TNA does provide him an opportunity to work less dates. It should also go without saying that RVD could be more optimistic about his character under the company's new creative direction.
As for a possible time frame, the last I heard he could return as soon as this week.