This week's open source cloud headlines yielded the not-so-suprising news that NASA will discontinue support for the OpenStack cloud platform it helped engineer. The reason? OpenStack is now receiving commercial support and the agency's funds are best spent elsewhere, according to Datacenter Dynamics.
Uptime: NASA to cut involvement in OpenStack
The agency that was central to developing the OpenStack platform has announced it will no longer be involved in the project. NASA will also stop work on Nebula, the cloud infrastructure developed alongside OpenStack.
OpenShift PaaS Roadmap for Enterprises Outlined by Red Hat
Application Development Trends
Red Hat announced its open source PaaS offering for the enterprise, a competitor to VMWare’s Cloud Foundry.
A Mobile Storm in the Cloud (Infographic) 
EngineYard.com via AllTop 
This isn't open source specific, but the connection between mobile computing and the growth of PaaS, the third largest cloud category, is interesting. PaaS is expected to grow 232% between 2010 and 2014. Who are the big open source PaaS providers? Red Hat's OpenShift, for one. VMWare's Cloud Foundry is another.
Open Source Cloud Computing: Could It Be Part of Your Next Cloud Project? 
When does it make sense for mid-size businesses to use open source frameworks for cloud computing? Web and social applications are a good fit. Internal IT skills are a must, according to this article. And for many, it may be too soon. The article argues that security is still an issue for SMBs in cloud adoption, but a Microsoft study  on cloud adoption disagrees.
Marten Mickos: Openness is Winning in the Cloud
The CEO of Eucalyptus says open source cloud startups are scaling in size with important customers and a large install base that make them competitive with closed source solutions.