Brian S. Hall has a overview of free cloud picture services at ReadWrite. Interestingly, before he gets to the review itself, he notes

Before diving into the features of the various services, it should be noted that taking advantage of any of these free cloud services comes with a potential price. As the saying goes, if an online site isnt selling you a product, then you are the product.

Good to see a public service announcement of sorts about the costs of “free” services becoming a normal part of a review. While well known to folks who keep up on tech issues, this material is still unknown to many people.