This is the Table for PS3 Compatibility directly from Sony's Website. Before I bought my own PS3 I read about this on GS but after listening to friends I began questioning which PS3s were and weren't compatible so I wanted to find out for sure. If this helps anyone else that's great. If not, I hope someone finds it interesting.

The compatibility of PlayStation and PlayStation 2 format softwaretitles for use on thePLAYSTATION 3 varies by modelas follows:

PLAYSTATION 3 models

• Hard Drive: 160GB Model Number: CECHP01 USB Ports: 2 Backward Compatible: No Release Date: November 2008 In Production: Yes
• Hard Drive: 80GB Model Number: CECHL01 USB Ports: 2 Backward Compatible: No Release Date: November 2008 In Production: Yes
• Hard Drive:80GB Model Number: CECHK01 USB Ports: 2 Backward Compatible: No Release Date: September 2008 In Production: No
• Hard Drive:80GB Model Number: CECHE01 USB Ports: 4 Backward Compatible: Yes Release Date: August 2007 In Production: No
• Hard Drive:60GB Model Number: CECHA01 USB Ports: 4 Backward Compatible: Yes Release Date: November 2006 In Production: No
• Hard Drive:40GB Model Number: CECHH01 USB Ports: 2 Backward Compatible: No Release Date: March 2008 In Production: No
• Hard Drive:40GB Model Number: CECHG01 USB Ports: 2 Backward Compatible: No Release Date: November 2007 In Production: No

• Hard Drive:20GB Model Number: CECHB01 USB Ports: 4 Backward Compatible: Yes Release Date: November 2006 In Production: No

Here the the direct link to Sony's PS3 Table. It looks nicer and is easier to read.