No
Yes and you can watch it and listen to it through the TV connected to the PS3. You can also share it if you have online connection to your PS3
Yes you can be online playing the PS3 and your computer can also be online at the same time. A PS3, PC, Laptop, Xbox 360, or Nintendo Wii have all been online at the same time in some households.
No they do not
yes you can play 2 players online on world at war on the same ps3 screen
yes
yes u can.
no ps3 must play ps3 etc
All the games I know about allow only a single online player per PS3. The number of PS3s that can go online from the household depends more on the capability from your internet provider because the PS3 and the PlayStation network would have no problem connecting multiple PS3s from the same location. Resistance 2 can have online co-op play from the same PS3, Warhawk and LittleBigPlanet may also allow more than one player on the same PS3 see related links
On the same system you can have 7. online it depends on the game
On the PS3 Guitar Hero it has better graphics and it has online play whereas the PS2 doesn't.
$0.00 for life actually the same as you internet bill