Many political cartoons are visual editorials, and some of the most concise commentary on the Iraq Study Group is found in such cartoons. These first three are good examples. They present very differing views of the ISG, but all are common perspectives seen in the MSM. Click on any cartoon for a larger version.
The cartoon above is from Steve Bell at the Guardian (UK). I don't usually like Bell's artistic style, but this one is a classic! (Thanks Don!)
And here are a couple more that are kind of fun. I particularly like the final one. I believe it's a deliberate parody of a widely circulated picture that shows George Bush looking at an upside down children's book during a school visit. The picture was photoshopped, but it was a pretty good job and fooled a lot of people, aided of course by the general perception that Bush is a moron. Snopes has the details.
You can find most of these cartoons and a whole lot more at Daryl Cagle's Professional Cartoonists Index. It's a fantastic site, so check it out!