Wireless Networking with PS3 | PS3Blog.net
Will you be able to connect to the internet on the PS3 wirelessly using a Router?
While I answered him by e-mail, I forgot to post my response here. (Sorry!)
The answer is that you should be able to, because the PS3 hardware specs list IEEE 802.11 b/g support. So if you have a wireless router and want your PS3 to connect to it, this should work just fine.
The question is, will the PS3 allow wireless connections to it? The specs list the PSP as a possible controller through Wi-Fi, so maybe. This is where I get out of my depth.