... I'm surprised not to see the original Priceline.com grocery and gas "name your own price" concept on the list. It was a huge flop.
Of those ten, the only one I ever had personal experience with was Pets.com. Except for cat treats that I can only buy online once the big coupon and shipping savings were ended for all the online pet retailers, it just isn't worth it. Petsmart and Petco have regular stores in addition to their online service so have survived well.
How many of them can you remember ?