Updated 10 Sept 2010: This 10 minifigures are confirmed Minifigure Series 6
Lego Figures Minifigures Series 6, as the forum post state.
From the Taiwan Lego forum, they mentioned this is a leak from the lego factory in China, showing 10 of the 16 figures. In one of the forum post (i had read all the posts), someone mentioned the figures are currently for sale on China auction site Taobao.
Looking at the quality, they are indeed Lego product and a few of these figures here could be on the list of Series 6. (Statue of Liberty & Grey Alien)
THESE MIGHT NOT BE THE CONFIRMED SERIES 6 MINIFIGURES.