Is it true that the ps3 is backwards compatible and does it have network online thingy already in it so you ?

Question

don't have to plug anything into the modem on the computer

Answer 1

PS3s that have BC- 20GB, 60GB, and 80GB

PS3s that don't have BC- 40GB, upcoming 80GB core and 160GB

Yes, you already have the network which can use both wired and wireless connection except the 20GB which can't use wi-fi

Answer 2

ps3 40GB not backward compatible,only 60GB and 80GB also i think that not all ps2 games are working fine on ps3 and the some of the working games have some graphic glitches.

yes ps3 is network ready.

Answer 3

For now, all PS3 has backward compatibility except for the 40 and the new 80 gb version.  

All PS3 has Wi-Fi except for the 20 gb model.