Thanks to both dave's comment and an Anonymous comment, I've got some more information on the beginning of Season 5 of Entourage.

Dave's comment:

Entourage returns September 7th, 9pm central.

I actually just saw a billboard for it today, and it just said 9pm. It wasn't until I went to the web that I realized it was a custom timezone ad.

and the Anonymous comment (I've marked some spoilers):

http://featuresblogs.chicagotribune.com/entertainment_tv/2008/08/michael-phillip.html [Link contains spoilers about Season 5]

Check out the above video for an exclusive look at Kevin Connolly in the opening scene from Season 5 of HBO's Entourage. Eric Murphy is watching as tv critics slam Vincent Chase and Medellin. Looks like Season 5 is going to be an uphill climb for Adrian Grenier's alter-ego. (also looks like the guys are living with Drama again!)

As I've stated (often) before, I just hope they can bring the show back to the greatness of the first 2 seasons.