Wizards announced this morning that 'Grab-and-Go' decks will be coming this February, in time for Mirrodin Besieged Game day. Akin to last year's Deckbuilder's Toolkit, this is a product meant for the introductory players.
Information is light on the product, the announcement is up on Wizards.com. The decks will be full 60 cards, 15 sideboard cards, ready to go for FNMs or other constructed Standard events.