"Five e-mails at 4KB each takes about 25 seconds, " said Neil Peretz, founder and chief executive officer of PocketScience.

CNN: E-mail arrives in your pocket

The fee includes unlimited incoming and outgoing messages with a 4KB, or 4, 000 character, limit per e-mail on the Sharp and JVC Devices.

CNN: E-mail arrives in your pocket

IBM, who first floated the idea last year, is now sharing some more details about its prototype device that, while only able to store 4Kb of data (roughly half the text of this post in ASCII), is said to be able to retain that for 10 years.

ENGADGET: IBM's prototype STT MRAM device spins your bits right round, baby, right round