Last week, we had the author of TDD for a Shopping Website LiveProject. Friday at 11am Ranch time, Steven Solomon will be hosting a live TDD session just for us. See for the agenda and registration link
"Multidimensional" means that data can be indexed by as many parameters as needed - it is not constrained to fit into rows and columns. This allows for much richer data models than can be achieved using relational technology. Complex data can be stored and used in a much more natural way.