Wherever there is wifi
Yes, The PS3 Has wifi,indeed.
NO
Yes the ps3 has wifi built in.
The Slim PS3 not available in less than 120 GB and all PS3 have the capability of online play. One of the first PS3 a 20 GB model just did not have built in WiFi, but you could use an Ethernet cable or buy the 60 GB model with WiFi.
You need to access the internet from your PS3 to go to the PlayStation network from your PS3. It does not have to be WiFi it can also be ethernet cable, but nothing else
The PS3 WiFi is to connect the PS3 to the internet and not to another WiFi device
Yes for the PS2 for the PS3 you can have WiFi or an ethernet cable
Yes the PS3 slim includes support for Wifi B and G
There is no WiFi button. That is on the router
PS3 improvements start with better processors and GPU. These help with better graphics and better game play. PS3 comes with a wifi adapter onboard. PS3 cans play blu-ray discs.
All models of the PS3 except the first 20 GB model have WiFi