I'm getting a PS3 Slim by the way guys, and the only ports on the rear are
Ethernet, HDMI out, Digital out, AV Multi out and AC in. No 3mm audio out socket. So does this mean that i can't get any sound?
Can't belive no-one has said this to you, or you haven't worked it out yet.
You use the AV Multi out cable (composite cable) that came with the PS3. You then get a 3.5mm headphone - Female Phono jack adapter (about $2-5) and that will give you a 3mm audio jack to plug into your speakers / monitor.
Not that difficult really
You then just make sure you select AV multi out as the sound output.