Update from Saturday, May 28:

Aisle: Almost entirely Pontiac G6s. Some were equipped with XM radio, some had sunroof, and some had leather seats, but none had all three features. In addition to the G6s, there was one Stratus 4-door sedan (the sporty R/T version) and a Malibu Maxx.

Exec Selection: A few Buick LaCrosses and Chevy Impalas...nothing special. All of the LaCrosses had the little XM antenna on top, while some of the Impalas had leather, sunroof, and a spoiler.

I was disappointed not to see any SUVs in the aisle, but I took a G6 with XM and enjoyed it. Averaged over 30 mpg highway, which is a whole lot better than the 20 mpg a LaCrosse or TrailBlazer would have done.

I'm renting at ATL again next Saturday, so I'll keep you all posted on the selection then.