I can get on the PS3 web browser and can download stuff fine but when i try to play games i can't even find a room. The only game i've been able to play online with now problems was Resistance: Fall of Man. My problem is exactly what the trouble shooting guide says is a firewall problem. i don't even use my firewall because of the problems it makes with games. I have a connection amplifier which boosts my signal and i have a excellent signal and everything works great except games. my ISP is comcast and i'm using a NETGEAR modem connected with the cable that came with the PS3. i used another cable so thh problem can't be that. I've moved since getting my PS3 so it can't be the location. I now live in an apartment and other people around me don't have any problems. If you need any more info just ask. hopefully someone can think of a solution because of course the problems can't be caused my COMCAST or SONY.