Prequel insider O-2D7, who has contributed some fantastic spy reports in the past (like Firing Squad, Fashion Statement, Drawn to the Dark Side, Sitting Pretty and Chain Gang among others) sends along a couple of scans from set plans for the Episode II reshooting that took place last April.

While the scans themselves aren't much to look at, there are some interesting designs and set ups for shooting that day. Perhaps with a careful eye you can pick up some details we missed as well:

(actual scans removed at the request of Lucasfilm, Ltd.)

Spoilers! (Highlight to read the analysis below)

We believe that in the first set of plans the gunship mentioned is the ramp from the rear of the new Episode II vehicle we posted a rendering of here. It is set in the hanger entrance and undoubtedly was used to film different actors and clonetroopers leaving the gunship and entering the arena. It could have also been used for an entrance shot or two also to be seen in the movie. Gobo? No idea what that stands for, and a cursory scan of the dictionary only gave us 'go between.'

In Set Plan B you can see the preparation for what we anticipated to be the Episode II shooting the next day, including the Geonosis Secret Hanger scenes with Palpatine and Darth Tyranus/Count Dooku. At the bottom of that scan you'll see a setup for a dungeon sequence, where several key players will be held before the Arena sequences.

Notice also the letters GCD 129, which means Genosis City Dungeon, scene 129 in the overall movie. We haven't been able to figure out much more, so if you do let us know.

Great report - and as always we're looking for inside information on Episode II!

UPDATE
Quite a few readers chimed in with the meaning of Gobo, here's from Doobus:

In stage production, a "gobo" is indeed a "go-between" - between a light source and its target. Usually a special matte or silhouette to create a specific type of shadow (like moving trees in the speeder bike sequence) but can also be colored filters.

And here's Volya42 take:

You've probably already had people telling you this, but "Gobo" is a theatre and film lighting term referring to a pattern - usually made of a small square piece of steel - that is inserted into a lighting instrument so that the pattern shows up in light and shadow on the stage or background. They are frequently used to depict shadows of leaves or windows, but can be made up to look like anything. I'm not sure what kind of pattern would be showing up in this case, but I'm sure it's specialized.

And finally, here's Ben:

In stage theater, a gobo is a lighting term. It's a metal (usually) cutout that slips on the front of a spotlight so that when the light is cast on a flat surface you see a projection of light in the shape of whatever is cut out of the gobo and allows the light to pass through. I've seen this used at sporting events too, most notably at hockey games (gobo catalogues have an entire set of NHL team logos that you can order). Now I don't know if the term is used exactly the same or even similarly in movie production, but that's the first thing I thought of when I saw the word "gobo" on that sketch. Anyway, for what it's worth.

Thanks to about 15 others for the help as well!