could be a number of issues as we have already established what model is the netgear router and whats the wifi cards used to connect the other devices or are they all internals if so try to find out what they are i.e Broadcom, Airport ect.
to get a little bit more detailed info on the other broadcasting networks around you use netstumbler it will tell you what channel they are all on and will allow you to see if a channel range isnt being used that you could try to cut the interference. www.netstumbler.com
Also not a bit fan of WEP you router will have a thing called ACL list on it this is a list allowing you to add the MAC address of each wifi device you allow to access the network this is like putting a man on the door and saying if you name aint on the guest list you aint getting in, WEP can be hacked on its own keep it active as it also encrypt your data something that ACL on its own doesnt do.
I'll try that netstumbler thing, cheers
Can't remember the type of Netgear router off the top of my head, i think it's this one:
http://www.netgear.co.uk/wireless_cable ... wgt624.php
But it might be the next one down, the 'Wireless-G'.
Each connected device is differant, my Macbook and Touch have internal WiFi cards but the PC has a Belkin adaptor. They are all affected in the same way. The wired connection to the router never has any issues.
Not sure what you mean about the ACL thing... I have it set up so any device can connect with the 128bit WEP key (26 character hexadecimal), so yes the router is storing MAC addresses for the connected devices but i'm not having to tell the router what they are? I thought 128bit WEP was the most secure way to protect a home network?