[LibWhacker]

Could be some rock layers near the rim, but otherwise it looks like it has very steep sides and there's no way in. It also looks like it's featureless sand all the way from just below the rim to the dunes at the bottom. But that could be due to poor resolution in the photo. Hope it makes it though. It'll be worth a closer view.

[NormsRevenge]

I'll be curious what kind of resolution the newly arrived MRO will provide..

hopefully Opportunity will be able to get some good shots of the outcrops

[bert]

.....It also looks like it's featureless sand.....

It looks like they uncovered a basketball at the bottom of the sandhole..