ModMyI reports that SaurikIT LLC just acquired Rock Your Phone Inc. In other words, Cydia bought Rock. Cydia has always been the installer of choice for most of us, but Rock was slowly getting traction, especially for some of its advanced features like the ability to back up your packages.
If you didn't think the jailbreak community was a big business on its own, then it's time to think again. Just like in the App Store, there is a lot of money to be made from applications, especially for those offering a marketplace like the App Store and Cydia.