How SharePoint and SOA Fit Together

What do you get when you take SharePoint, a wildly popular product, and Service Oriented Architecture (SOA), a widely misunderstood but sought after technique for improving the agility of an IT department, and put them into a single article? Hopefully you get a popular article where people poke their heads in to learn if this is another combination like peanut butter and chocolate, or if it's more akin to spinach and strawberries.