Love the series, too. I agree that it started shakey but has gotten stronger with each episode. And now it's really addictive. I like a series that keeps me guessing! I also like programming that thinks beyond the TV, so I completely geek out on the phone calls from Nathan Petrelli (got one, too), text messages about voting scams, and hidden codes on web sites. I'm a little worried about who they are going to kill off. Somehow I suspect it won't be who I want to die (Jessica!) and will be someone I like (not Nathan or Ando please!).
Oh and I also abandoned 24 at the start of the Audrey storyline. There are enough good shows coming in the Fall (Bionic Woman, Pushing Daisies, IT Crowd), so I feel okay about dropping it.