There are a few issues of Aqua Journal that talk about aquascaping with driftwood, July and October 2012 if I remember correctly. There are some great pictures in there of wild ecosystem examples.
Basically epiphytic plants are a good match, such as Java Ferns, Moss, Bolbitus, Anubias and so on. That is because such plants in the wild would be found growing in similar places, like underneath or attached to a sunken piece of wood. I also like hygrophila pinnatifida for this purpose. In ADA View 402 I think is a good example.
One of the tips would be to cover up the unsightly portions of the wood with the plants. Like where the wood was cut or a knot. Also when wood is joined together to cover up the joints.
As for arrangements, there is concave, convex etc.