If I may add:
Medyo maselan ang PS3 when it comes to wireless routers. I use a Netgear wgr614 ver. 4 at home and ayaw (i've tried all the configurations) magconnect ng PS3 unless i turn password protection off. So i ended up with an unprotected wifi signal, pero i disabled SSID broadcast.
sometimes din, when Im online with the ps3, it affects the other laptops connected via wifi. if only malapit sa play room ko yung router, i'd use a wired connection.
hope this helps.