Excerpt from the article post on SinoLogic :

We talked a lot about how to install Asterisk on different devices, platforms, etc.  Today we will explaining how to Installing Asterisk on a PlayStation3!, following the maxim "if it enters a linux have to run our Asterisk" we've tested on a Playstation3.

For less than 300 Euros which is what this beauty does currently, we have a media center, blueray, console and all in one unit!

Step 1 – Update:

This facility is valid for firmware versions prior to 3.21, as from this Sony firmware has eliminated the possibility of installing Linux on a rather controversial decision.  You can see more information here