This obviously a consider the source type of deal (PFT), but they are reporting that Briggs is not as gone as we might have thought. In fact they are saying the wink-nod deal with the 49ers might be dead and that the Redskins are no longer considered the front runners.
They go on to speculate that the Bears filing charges against San Francisco might have made the team back off their deal.
To add to it, it seems he is considering staying with Chicago.
Rotoworld seems to that it may have to do with an new proposal, but again all this is just speculation.