Pets.com is a name synonymous with the failure of the first dot.com boom.
It was founded, went public, and crashed out of existence in the space of 2 years after spending hundreds of millions of dollars on infrastructure, marketing, and warehousing. The company aired a Super Bowl ad which cost the company $1.2million to spread the the slogan "Because pets can't drive".
The company went public a month later in February 2000. Pets.com tried to get people to buy all their pet food and accessories online before ecommerce had taken off. Consumers didn't trust ecommerce in 2000 and 320 people soon found themselves looking for new gigs. For more info, see the Wikipediaentry.