Wizards have today release another errata which can be found at http://www.wizards.com/dnd/files/UpdateJuly2010.pdf.

Whilst I haven't been through it thorourghly yet I did two things ddd stand out

1 -Spinning Leopard Maneuver has had the damage reduced to 2d6 + dex mod. The rest of the text remains the same.

2 - Magic Missle now hits automatically. The attack and hit entires have been removed and replace by an effect entry (below).

However the amount of damage that it deals has been reduced (was 2d4 + Intelligence mod for heroic tier). As there there is no attack roll you cannot get a critical hit so you will never get to apply crit dice from magic implements.

The implement keyword is still there so you will continue to add a magic implements modifier to the damage.

It can still be used as a ranged basic attack, so for any budding Leaders that can grant their allies basic attacks, look to the wizard for guarenteed damage.

Effect: 2 + Intelligence modifier force damage. Level 11: 3 + Intelligence modifier force damage. Level 21 5 + Intelligence modifier force damage.