Rokk Krinn also enjoyed Justice League of America 7 and hit on many of the same points I did, including the rapport shared by Hal, Dinah, and Roy. I keep meaning to link more to people whose reviews I enjoy and this is me making the effort. Rokk also mentioned other examples of great characterization in the book that I, being Roy-centric, didn't mention.
And if anyone isn't eagerly awaiting the JLA/JSA/LSH crossover event coming up, they have no sense of DCU history.
I'll have some more reviews up in a day or so. I'm still trying to figure out what to say about the latest issue of Supergirl.
Edited to add: Rachelle had some nice things to say about Roy and JLA 7, too.