Much like the Windows Live Messenger phones that have been popping up lately, this Siemens Gigaset S450 is a cordless phone that connects to the PC via a USB adapter. But instead of Windows Live Messenger, this phone works on Yahoo! Messenger—oh yes!
Now you can walk around the house, provided your house only goes 50 meters in each direction from the phone, and make calls through your landline or through Yahoo! Messenger. Pretty snazzy, if you're into the whole VoIP thing, and know people who use Y!M. – Jason Chen