NASA Space Missions Fuel Massive Storage Projects, Byte and Switch
"Earlier this month, NASA revealed that it will deploy a 20,480-core Altix ICE supercomputer from SGI at its Ames Research Center in Silicon Valley this summer. Capable of 245 trillion operations per second (Teraflops), the supercomputer will support future NASA projects, chiefly manned missions to the moon and potentially to Mars."
NASA taking open source into space, CNet
"Open source is such a natural for government agencies, it should come as no surprise that NASA is now developing an open-source project called CosmosCode. The goal? "To provide a common access point for individuals, academics, companies, and space agencies around the world using, contributing to, or supporting re-usable, modular, extensible, or standards driven space exploration software."


One potential sticky point with open source is the issue of export controls and ITAR. Most things that go in a spacecraft, or are used in controlling the spacecraft on the ground, are potentially export controlled, which sort of puts paid to the idea of open disclosure.
For instance, I doubt the export control folks would like to see high precision rendezvous navigation (aka targeting) algorithms published openly.