Even though the show has dropped off a little in quality since about Seasons 3 and 4 - a little too much time was spent with the Vito coming out of the closet storyline over the past season, for example - "The Sopranos" has consistently maintained a high level of output in bringing us the mob world of New Jersey. Picking up from the Martin Scorsese's gangster world of Goodfellas, the show has been a great ride, no matter how gratuitously violent or expletive-laden.
Things are going to go down in a glorious fury during these final episodes, and rumor has it that two main characters will get whacked/killed off. My guess is that Junior and Paulie will bite the bullet; Junior's dementia and desperation are too much for him to handle, and Paulie's hot temper and past trangressions will probably be his downfall. Christopher would be a prime cadidate, but he should survive. Silvio is too level-headed and careful to get whacked, and while it would be interesting to see the writers kill off Tony in the end, I don't think we'll see it happen (although another attempted hit against him wouldn't be surprising).
Regardless of what transpires, these last nine episodes should be a fuckin' blast.
Here's a video of every single death/whacking on the show:
MP3: A3 - "Woke Up This Morning" (Sopranos Theme Song)