] Enjoy your iTunes music library in virtually any room of
] your house. Share a single broadband Internet connection
] and USB printer without inconvenient and obtrusive
] cables. Create an instant wireless network on the go.
] Extend the range of your current wireless network. How
] many devices do you need to do all this? Just one.
]
] Presenting AirPort Express.

This does everything a AP/Router should do and is the same size as the Apple power adapter. Not only is this great for the home, but its perfect for travel. I'd much rather have one of these then the AP I carry around..

Apple - AirPort Express