Check the article, and especially comments, for discussion of who is poised to have a breakout season. If Charlie Bell and Monta Ellis make national headlines, Sean Deveney's going to look like a genius. Some players, off the top of my head, who I think might vie for most improved of 2006-2007: Darko Milicic, Kevin Martin, Jose Calderon, Jarrett Jack, Dwight Howard, Marvin Williams, Devin Harris, Andre Iguodala, Jason Maxiell, Deron Williams.
NBA player has blog, gets super-creepy (probably joking) stalker comments. Mark Madsen should probably get someone to moderate those comments.