Ok I can help with this situation. I have tried three different 802.11G routers (thanks to Circuit City's return policy

).
I have tried the Belkin, Netgear and Linksys. I ended up staying with the Linksys for the sole reason of not having a problem with my cordless phone.
All three were extremely easy to setup. In fact all I had to do was enable a wireless connection, and the Airport Extreme card connected instantly.
The Belkin, was the worst as far as range goes, I was 25 feet away and only had two bars on the Airport Status on the Menu Bar.
The Netgear was a great router, had terrific range, but I didn't choose it because my 2.4GHz phone and it did not get along. At 25 feet away and two walls between me and the router, I had full signal.
I have had the same results with the Linksys, but it plays nicely with the cordless phone.
I highly recommend both the Netgear and the Linksys. In my honest opinion, the Airport Base Station, is over priced. Almost all of the same features can be had with both the Linksys and Netgear, the Airport base just looks better

.
BTW......I have a 14" G4 iBook 933Mhz with 640MB of RAM.