I don't know if this would be helpful to anyone but I guess I should at least post my resolution.
I had been messing with my router and upped the firewall protection. I logged onto it and lowered it back to where I originally had it and everything went back to normal.
It may not be the case for any of you, but if you have any doubts, checking your router logs would be something you could try, and at least make sure that your system isn't trying to block your PS3 inadvertently. If I learn anything else, I'll post it. Good luck my GT family!