Hmm, well that's no good.
I did a test peice today at work. I just Routered out a curve and Veneered some of the peices of Mahogany together. It certainly has quite a bit of spring to it. It's a really heavy/dense wood. I also came across a 80" peice of Mahogany at work, the grain is pretty straight, I can't tell the heartwood/sapwood ratio since the wood is all one color and pretty hard to even see the grain on the wood. Even the 80" peice has quite a bit of a spring to it, as it already bends slightly and it is over 2 inches thick. I'll do some work with it, take a few shots and then report back here to see what people think.
If anybody has any information though in regards to Mahogany being used, please give me a heads up. I havent been able to find anything and a reference would be great.