Do you notice sometimes that the bandwidth is significantly reduced? In November 2010, i uploaded a blog entry in which i explained how to see if your ISP is shaping your bandwidth without knowing it. But the reason for the slow download may be closer than your ISP, as close as your neighbor for example. Lifehacker uploaded a new entry in which they explain 2 simple (sort-of) methods to see if (and probably who) "steals" bandwidth from your wireless router. Most interesting for those Wifi maniacs. Read the article here.