Chris Broussard is reporting that they are making progress again and that the negotations are going "very well", as per unnamed source. Of course it may all still fall apart again like last time. It's almost 2AM ET and they are still talking apparently. They'll get an extra hour when DST ends.
Update: Just watched NBA's press conference. According to Stern, the mediator suggested a compromise on several of the issues, including a 49/51 band revenue split, and the league accepted 5 out of 6 of the proposals including the new BRI. The players union did not accept any of the compromises. The NBA will leave the new proposal on table until Wednesday. If the union does not accept it by then, NBA's next proposal will be 47/53 with a flex cap.
The new BRI split is a band split that depends on the actual revenue. The players would get between 49% to 51% of BRI depending on whether revenue is lower or higher than expected.
Update 2: Fisher said that the players union went down to 51% of BRI (with some of that going to retired players, although he wasn't clear about that). He insisted that the NBA's BRI proposal is still essentially 50/50 since they are unlikely to ever get 51% under the band proposal. He was being very vague about specifics of the system issues, but he did say the union did not like any of the mediator's suggestions that Stern said the NBA would include in their new proposal, except perhaps for one. He considers NBA's Wednesday deadline as an ultimatum, and said that NBA's current proposal, even with the added changes, is not something he would bring to the players to vote on.
It seems to me that they are really close on the BRI and the owners should consider going up to 51% fixed as opposed to the current band proposal. That may be enough to get the deal done. I don't know why the union is so preoccupied with the system issues when they all have to do with restrictions on tax paying teams, but with the much harsher LT there will likely be only a few teams subject to these new rules. NBA has reportedly compromised on many of the system issues still unresolved, but the union has not offered any compromises apparently.
What bothers me the most is that Fisher repeatedly stated that this is not a proposal he would allow the players to vote on. So even though the majority of players would likely approve it, apparently as long as Fisher, Hunter and the rest of the union committee doesn't like it, the rest of the players don't get a say.