Maybe your PS3's network settings got messed up by the storm outage(?) and needs to be reconfigured.
Also, was your wireless home network using some sort of security protocol like WPA? Did you need to set up a dedicated IP (or IP range), etc. for the PS3? Check to make sure everything's...
Aye. Pick up a wireless router -- and they are quite affordable -- and save yourself the trouble plus give yourself some added protection in the process.
_Man_