I just purchased an Airport Extreme base station to use with my Airport Express. Well, I hooked the base station up to my Motorola cable modem and followed Apple's directions for setup. The base station is throttling down my modem. When my iMac is directly connected to the base station (with the station's wireless turned off), it receives an average speed rate of 300k and sometimes that can get as low as 96k according several "speed testing" sites. It also feels really slow when downloading or watching streaming video. If I unplug the modem from the base station, and plug it directly into my iMac. My speed jumps up to around 700k-1300k and downloading or streaming content is much faster! I know speed tests can vary (especially CNETs), but I tried about 5 different sites, on average of 15 times each test. Whats going on? I have called AppleCare, and they didn't have any suggestions---they recommended replacing my cable modem or ethernet cable. I doubt thats the rememdy. Anyone got any suggestions! I would just take the base station back, but Apple limits MacMall's exchange policies and forces the customer to deal directly with Apple (at least that is what my "Account Executive" at MacMall told me). Heh.