[asharp]

As I remember rackspace is a cloud in the same sense that Linode is a cloud, but not in the same sense that Amazon is a cloud, ie. they've taken an existing vps product (Slicehost) and resold it under the 'cloud' brand rather then developing something new from the ground up as a cloud.

[bradgignac]

Per the blog post, Cloud Servers is no longer based upon an existing VPS product. Instead, it is based upon the OpenStack project that Rackspace started with NASA in 2010. http://en.wikipedia.org/wiki/OpenStack