24. Sony Mylo (2006-2008?)

The Sony Mylo ("My Life Online") was basically the PSP with a keyboard. It was supposed to appeal to high school and college kids, but it was overpriced and lacked a ubiquitous wireless connection (it had Wi-Fi but no cellular option)--and didn't play PSP games. Like a lot of Sony devices, the Mylo was beautifully designed. However, its conception was fatally flawed. We most likely won't see a Mylo 3.