From the website: "Microsoft codename Dallas is a new service allowing developers and information workers to easily discover, purchase and manage premium data subscriptions in the Windows Azure platform". From what I see the concept is to allow an organisation to upload data or datasets to the site, to be sold or given away to registered users. Isn't this a bit like the internet, but with a twist? Anyway, useful tool for storage, discovery, and delivery of important datasets; or thinly disguised attempt to implement a charging model for the internet? You choose.
Footnote: I wish a certain train company would stop routing their onboard wifi through Scandanavia. Too many websites are now defaulting the language based on location and I'm afraid that I don't Sprak Svenska.