I set up all devices with manual IP numbers and disabled DHCP on the network (didn't have to, but saves hassles). I used IP printing on my Airport Macs, a Netgear MA111 WLAN USB (dirt cheap) on a Windows PC and plugged in another PC's ethernet into the MA814. All computers now print happily to a network printer and can share files as well as an ADSL conncetion via an ethernet modem plugged into the MA814.
The whole setup is neat because the only wiring is around the printer desk - the office otherwise is virtually wireless! Client's WLAN laptops can quickly be configured - so they can use our printer while in the office. This whole WLAN stuff is absolutely fabulous!
Also refer to this hint's comments for more info.

