The NBA will start cancelling regular season games today if no agreement is reached. Once both sides cross this particular Rubicon, it might be a while before something else looms large enough to get the parties back to the table in any meaningful way.
The NFLPA and owners were smart enough to avoid this milestone, but the season is longer in the NBA, and the cost per cancelled game is arguably less. Perhaps there is still some financial calculus at work notwithstanding the jangled pace and tenor of the negotiations.
UPDATE: Looks like the NBA will lose the month of November, completely.