Matt,
I am slowly working through Bruce Haodley's "Identifying Wood" book. If you can spare a small (2x3x1 or there abouts piece), I'll be happy to work through the identification steps and pass along the results.
As for all others, if you have known or unknown pieces of domestic or exotic woods, and are willing to share a small piece, I'd love to build a library of tested samples. Of course I will share any identifications I make with the donor and will share the entire library at group events. Any size piece is great but as mentioned above a 2x3x1 piece is small enough to spare (I hope) and plenty big enough to see both gross (visible to the eye) and microscopic features that uniquely identify individual woods.
Chris Tully