A really bizarre article on IEEE Spectrum. I say bizarre, because it totally nails the problem (linking databases), yet totally flubs the solution (Web services).
If you want to open up your databases and link them together, look no further than the Semantic Web.
Update; yes, I know it’s a pro-Semantic-Web article, I’m just pointing out the misconceptions about Web services. They are not about publishing data. That’s what the Web is for. The article even claims that HTTP was designed for HTML, which is totally false.