This week in the cloud was a fairly unusual one, in that we have seen not one but three big announcements marketing the convergence of at least two trends in the cloud.

First up is Rackspace’s news.  The web host revealed a massive commitment to OpenStack, an initiative it conceived only two years, by migrating its flagship services to the platform. In 24 months OpenStack managed to build an ecosystem with hundreds of partners, produce five different versions and become one of the largest cloud companies’ solution of choice.

The update stirred a lot of buzz, and not just from the blogosphere. Several companies jumped on the bandwagon, including Nicria and Infochimps. The latter announced right off the bat that a huge chunk of its big data portfolio – its management, provisioning and visualization offerings – support OpenStack, and as a result, the Rackspace Cloud.

The third item comes from Appcelerator, the mobile development solutions maker. It launched the second version of its popular Titanium platform, with the biggest addition being a new tool that saves web developers a lot of time. It does that by automating a big portion of the backend coding that goes along with writing an app. Titanium 2.0 just so happens to support all the major frameworks and languages, with a cross-platform API due to arrive in a few months’ time.

Last but not least is the personal cloud news from Hewlett-Packard, which is also getting involved with mobile.  The company is targeting the enterprise with two new products that complement each other  –  an app management console and testing environment, in addition to a data manager that allows employees to access corporate information more effectively.