Ok, so Sandy doesn't actually tweet, but it sounded better than "Facebooking on the Levee" or "Playing Words With Friends on the Levee".
The levee is actually pretty amazing. It's goes all the way along the Mississippi from New Orleans to Baton Rouge. It was built in the 1930's after a devastating flood in the 1920s. It's basically a big hill with a single lane dirt road along the top of it. When you drive along the real road (down to the left), you can't actually see the river.
This photo on the levee was taken right across the street from Oak Alley Plantation, and is clearly a spot for tourists to grab a photo op of the plantation, which is across the main road to the left. After we snapped our own photos, up pulls this bus, and out pops about 20 tourists. That was our cue to high-tail it out of there.
My first question when seeing the name on the bus: "Tour company? Or dating service?"