Developing an application for the PS3

Is it possible to create an application (not a game) on the PS3? I know that there are ways to install Linux and all that but I was hoping there's something which you can just download from the net and run. I'd want the app to run like a server/daemon and be able to access the network.

You might find the following to be of interest.

From StackOverflow:

• Develop for Playstation 3 Linux
• Development Resources for Mono on Playstation 3
• How do I Code a Mono Daemon?

Programming high-performance applications on the Cell BE processor

• Part 1: An introduction to Linux on the PLAYSTATION 3
• Part 2: Program the synergistic processing elements of the Sony PLAYSTATION 3
• Part 3: Meet the synergistic processing unit
• Part 4: Program the SPU for performance

Interesting, but probably not what you're looking for:

Learn and Compete in Programming the PLAYSTATION®3 Cell Processor (source)