in my posession i have:
1x Netgear DM111 router, 1 lan cable port, provided by ISP (Vodafone)
1x Netgear DG834G Router, wireless 4 cable ports, provided by ebay
1x Dell Wireless 2350 Router, wireless, 4 cable ports provided by 'rents
the only one that can access the internet directly as a router is the DM111 provided by Vodafone, the other two fail on authentication even though my user/password is correct

Tech support no use as they say i should have bought the correct wireless one from them
When i connect the working single port router direct to the PS3 it doesnt work but Direct to the comp it works
So i set about using the dell/ng wireless jobs as hubs rather than routers, which works fine for inet on my main PC but not for the PS3
im seriously contemplating just phoning the ISP and buying their approved 4 channel/wireless router to try and make things simpler, but i dont know if it will or not.