30061 Attack Wagon is a set that was rumoured to be planned for release in Summer 2010, although as of October 2010, it still has not been released in the US. It includes a siege cart and one Dragon Soldier armed with a sword. This is the only Kingdoms set that includes this exact minifigure, since he has a rare Pirate face from 2009 which has side burns and stubble markings.
From lego wikia
30062 Target Practice is a LEGO Kingdoms set that was rumored to be planned for release in Summer 2010, although it still has not been released in the US as of October 2010. It includes a Lion Archer, two green apples and a chicken leg.
Another rumour set is Target Practice 30062, and I can confirm this set is really a rumour, not avaliable for sales.
UPDATE 5 Jan 2011: Earlier, I thought this set was a rumour, it only appears recently in the market, the quantity is much less (actually very limited) and more expensive. Check my review for this set.