Thank you all for the feedback. I hot really lucky with the driftwood. I saw it at the lfs and thought it looked cool, so I bought it. This was 2 months before I got my spec. I thought about doing some kind of nano, but didn't know what. I think it fits perfectly.
As far as the rock goes, I'm not totally sold either. With the dark wood and substrate I felt I needed some contrast. I thought about tieing some plants/moss to the wood. But, to be honest I don't want to lose the character of the wood. It has so many cool little nooks and crannies that I don't want to cover up. I have been thinking of covering a piece of slate covered with riccia or moss to make a little carpeted area.
I appreciate any other critiques and recomendations.