Google's Gmail currently lacks a calendar function, and some believe the firm would like to add one - albeit perhaps a limited version that could serve home users well without meeting the requirements of corporate users, thus avoiding a head-on challenge to Microsoft's business model.

BBC: Analysis

On the Juke, for instance, a click on the phone's scroll wheel brings up a text messaging screen, a calendar or a picture function, just as if a finger were pressing the keys of the real phone.

FORBES: Ditching The Dummy Handsets

Sharp's TeleMail will also include a scheduler, address book, calendar, and a memo function in a addition to the PocketScience technology.

CNN: E-mail arrives in your pocket

ComScore said that the highly variable growth rates in the final two weeks (extremely high in the penultimate week and extremely low in the final week) are primarily a function of the way the calendar fell in relation to Christmas.

FORBES: U.S. Online Holiday Spending Up 14% To $42.3 Billion; 'Fiscal Cliff' Debate Stalled Additional Growth

The name alone is enough to raise eyebrows, but wait until you see the special features: a biorhythm calculator, a fatness function that calculates a user's height-to-weight ratio, a calendar for keeping track of your menstrual cycle and a calorie-counting function.

ECONOMIST: Mobile telephones