1. AL East - The AL East's big three teams are simply better than the NL Central's three best. I'm cheating a little in this ranking by basically making the tiebreaker that Vacek's 4th best team which ran screaming from the AL East is a good bit better than Gabe's 4th best in the NL Central (which may wind up being the 3rd best).
2. NL Central - Just go down the names of the GMs in the divison: Nate, Aaron, JP, Gabe... OK we'll stop there or it'll start hurting my argument

3. AL Central - Last year's AL Champion may not even be in the top two of his own division. Doesn't boast the elite teams of the ALE or NLC, but the depth is impressive.
4. NL West - Five almost evenly matched teams, there are no pushovers in this division and the race should go down to the wire. Nothing really snarky to add.
5. NL East - I agree with Jim that it's not the worst division in the IBC, though that is certainly damning with faint praise when we see what comes next. The vagaries of the SIM gave Atlanta a ludicrously good SIM, but after Florida there's a steady stream of pretty decent-pretty mediocre.
6. AL West - A four team division needs to have its teams reach a higher standard to compete in these power rankings, and I'm sad to say my home doesn't. I may well win 100 games again, and Ropers should be comfortably over .500, but the other two teams aren't really sure what direction they're going and when half the division is eminently beatable that knocks us down to the bottom.
Note to Brennan, Seth, and Dave, hell yes I'm calling you out.