In a post on the Nodester blog, AppFog chief exec Lucas Carlson announced that his company has acquired the  Node.js PaaS. Terms of the deal were not disclosed.

AppFog already supports Node as well as Java, Ruby, PHP and a number of other popular languages and frameworks. This buy will enable the firm to beef up the capabilities it’s offering to Node devs, as well as to gain access to the Nodester’s well-established user base.

“Nodester has one of the biggest communities Node programmers and Node.js was the fastest growing language on Appfog” Carlson said. “Node. js is a server-side, event-driven programming language popular among developers writing web applications.”

Nodester is an open-source solution that’s available as an API that runs in the cloud. Developers can run it in a private instance on their IaaS of choice, be it EC2, Rackspace, Azure or HP Cloud Services, and AppFog doesn’t seem to be interested in changing that.

Carlson promises that his company will “run and maintain the Nodester service as it is” – AppFog is only adding support and is taking on the role of main sponsor.  “A seamless migration path from the Nodester service into the AppFog service” will be made available, the CEO said.

It wasn’t mentioned whether or not contributors to the project will be joining the PaaS provider as a part of the transaction. The whole process, including integration, is due to wrap up by Jan 15, 2013.

Last month AppFog announced a new billing model in which it charges users for the RAM they use instead of for the compute or storage resources they’re consumping at the same time.

PaaS is really hitting it out the park. This latest buy comes on the hills of Rackspace’s acquisition of Mailgun, a startup that offers an email service for OpenStack.