To enable all the Macs in your office to share an Internet connection, there's still no better option than Apple's ownAirport Extreme. (Note that it's a router -- the actual Internet connection is up to you.) The Airport Extreme provides WPA/WPA2 and 128-bit WEP encryption but also lets you create a guest network for temporary access. It also supports remote printing and hard drive sharing. It may sound expensive at $179, but few bargain routers have all of the Airport Extreme's features.