Possibly. I had all kinds of problems with Airport and the Seimens Gigaset wireless phones. I've since switched to using a GSM mobile provider for all my voice traffic, so I haven't investigated further to see if different channels on the phone helped, or if there was any way to sort it out. It's possible that newer implimentations of the phones would interfere less, though.
The biggest problem I had was that when I used the phone, 802.11b traffic would slow way down, like using a 300 baud modem. Awful.