Rogier Brussee has pointed out to me in his Blog that Google misses database based data (hmm awful phrasing Andy!) on the Internet too, but we just don't notice, as there are so many interlinked pages to make the output useful. He says wait and see as Google people are smart and this could be a big market for then. I for one am not holding my breath but I have strong empathy for Rogier's (as usual) well though through arguments.