The Wall Street Journal Online has a story by Katherine Meyer, The Best of the Worst (May 3, 2006) about dot-com duds that failed like Microsoft’s iLoo portable toilet with an internet connection. (Yes, it was supposed to have a waterproof keyboard and would be used at UK music festivals.) Other duds include CyberRebate.com, Flooz.com, iSmell, and the CueCat. The last dud mentioned is PointCast which offered a custom browser for push content which I actually tried for a while. This came from Slashdot.