Standard Kithkin Aggro
Kithkin Aggro, also affectionately known as "White Weenie", is a popular deck in the Standard environment. It wins using an old Aggro strategy of playing as many small and efficent creatures as possible to overwhelm the opponent.
Samples decklist, as piloted to 4th place at Worlds 2008 by Hannes Karem:
Untitled Deck