Cisco's hosted e-mail service
We know what you're thinking: Cisco had a hosted e-mail product? It's true. But proving that the cloud isn't a sure thing, Cisco offed its cloud-based Cisco Mail service just 13 months after introducing it. Cisco folded the service after investing $250 million in it because customers have come to "view their e-mail as a mature and commoditized tool," apparently making it less juicy for Cisco as well. Not that Cisco has any shortage of other products to sell beyond its traditional routers and switches.