I'm just a caver in southwest Missouri who happens to like photography as well. I've still not mastered the art of underground photography, but I enjoy it greatly. The new version of Photosynth has enabled me to do walk synths of some of the area caves.
While they look pretty cool, they are also a very good way of showing non cavers exactly what there is beneath their feet. And it's also a good way for older cavers to see sections of caves they are no longer able to access on their own.