I've only seen bits and pieces of a few NBA games in the opening days of the 2010-11 season, but there are at least two teams that have gone back to an earlier era in franchise history with their court designs and uniforms. These are the Golden State Warriors and Utah Jazz.
The Warriors, who sported a space-invader type of logo in recent years, have now gone back to a bridge motif (reminiscent of both the Golden Gate and Bay Bridges) as the major component of their emblem. The shift hearkens back to the team's days as the San Francisco Warriors before the move to Oakland in 1971 (see franchise history). This photo from the Warriors' home opener against Houston shows the new retro center-court design.
Meanwhile, the Jazz has brought back its music-note logo (hearkening back to the team's founding as the New Orleans Jazz; see franchise history), although the mountain logo of more recent years has not completely been abandoned. This team press conference featured artist renderings of both logos. I don't know exactly how the two logos will coexist. As seen in this highlights video from Utah's home opener against Phoenix, it was the music-note logo at center court.