The NBA's letter to the union, containing its revised proposal to the players, has been published on the USA Today site.

Via Twitter, Ken Berger of CBS Sports reports that the NBA has agreed to keep the luxury tax rates the same in years one and two of the new CBA.  This is consistent with the NBA also allowing luxury tax teams to complete sign-and-trades in the first two years of the deal, essentially conceding to give the players a two-season grace period before the new luxury tax system takes effect. 

Before the union meets Monday morning to decide the fate of the proposal -- and perhaps the 2011-12 season itself -- the league office has had an active weekend trying to educate players, agents and the public on the terms of its proposal, which the NBA feels has been widely misrepresented.

The league's @NBA_Labor Twitter feed has provided clarifications directly to players, the NBA held a Sunday Twitter chat in the names of David Stern and Adam Silver, and its proposal letter to the union found its way to more than one media outlet. 

Later Sunday, the NBA uploaded a PowerPoint-style presentation to YouTube outlining the benefits of the new CBA (located here: http://www.youtube.com/watch?v=_C4zaisIRxQ&feature=channel_video_title).