I'm not sure if the PS3 has a wireless connection, but if it does, you should look into the program WMWifiRouter, a thread can be found here:
http://forum.ppcgeeks.com/showthread...ght=wifirouter
This program creates a wireless network using the data connection of your phone as a gateway to the internet. I have tested this program and it seems to work great. It's free for now because it is still in beta.