This issue is a variant of Superman (DC, 2006 series) #709 [Direct].
"Printed by Quad/Graphics, Montreal, QC, Canada. 3/4/11."
Two covers were done for this issue; one featuring Superman and Flash, and this alternate one featuring Superman flying over a street (10 issues for 1 issue mixture).
For every 10 copies of the standard edition, retailers were allowed to order one copy of this variant edition.
Story continued from the previous issue, and continues in the next issue. This is not a co-writer situation, Roberson is working from Straczynski's plots; they gave him a rough outline that JMS had turned in for the remaining issues of the Grounded arc, which amounted to a sentence or two for each of the issues, spelling out in general terms where the issue would take place geographically, specific guest stars, etc.
When a waitress trips and spills food in front of Flash, he responds by saying "Happens to me all the time." And indeed, it happened in his first appearance in Showcase (DC, 1956 series) #4, when he first figured out he had speed powers by saving all the spilled food.
Superman's reference to young Lex Luthor "stealing forty cakes from the school's bake sale" is actually an inside reference to the old book "The Super Dictionary", a 1978 children’s book from Warner Educational Services that used DC Comics superheroes to define some 4,000 words. One of them was "forty", and to illustrate that, they had a picture of an adult Lex Luthor stealing forty cakes with this text: "When no one was looking, Lex Luthor took forty cakes. He took 40 cakes. That's as many as four tens. And that's terrible."
House ad for: Reign of Doomsday (Steel #1, The Outsiders #37, Justice League if America #55, Superman/Batman Annual #5, Superboy #6, and Action Comics #900). Appears on page 24 in this issue.
Letters from Jeff Dyer, Chris Schmitt, Dennis G. Barnes, Robert L. Fraser, and Adam Lindhart.
House ads for the following graphic novels: Green Lantern: Rebirth, Green Lantern: Secret Origin, and Green Lantern: No Fear.
Previews the cover and 5 pages of the upcoming series, said to be on sale in April, but was actually delayed until August.
Ian talks about the upcoming Chicago Comic & Entertainment Expo (C2E2), and the DC contributors attending it. Appears on page 34 in this issue.
Total of 5 one-page ads for: got milk? with Chris Bosh (milk, America's Milk Processors), WonderCon (comic convention, Comic-Con International), Chicago Comic & Entertainment Expo (C2E2) (comic convention, ReedPop), 5 Prism (gum, Wm. Wrigley Jr. Company), and Hero Factory (toy blocks, Lego). Appear in various places in this issue.