This has been happening since this past weekend. I live in an apartment complex and have cable modem so I thought it was the neighbors using torrents and killing my bandwidth. I have a secured network but the WiFi connection on both my iMac and Macbook has been so slow (can't even stand to watch even youtube videos). However, when I plug the ethernet cable directly into both the iMac and Macbook, I get back my normal speeds. I have a Tmobile branded Linksys router; I know it's the not router problem because my Gateway Laptop's WiFi connection is still fast. Any help would be appreciated. I am running Apple Leopard 10.5.2. Both my iMac's and MacBook are the Current generation models.