Denver: can throw the ball w/ Plummer being more turnover-conscious this year, Lelie is progressing this year, and Smith is still a threat
Atlanta: one of the very best teams in the league in running the ball, plus Vick can cause all sorts of problems w/ his running and throwing once he escapes the pocket
San Diego: Brees is showing that last season was no fluke, McCardell is having a nice year catching the ball, Gates is solidifying his status as the best TE in football, and LT is a receiving threat also
Even if these teams aren't putting up Rams-type passing numbers, all of them have enough balance that you cannot just focus on the run and hope to shut them down.