Apple has just released the final version of Mac OS X 10.6.6 Snow Leopard. It is a recommended update and it implements hundreds of fixes since the last few updates, 10.6.5 (November 2010), 10.6.4 (June 2010), 10.6.3 (March 2010) and 10.6.2 (November 2009). Also included is the much anticipated Mac App Store. You can get the update from Snow Leopard’s Software Update, or directly from the Software Downloads page here.
You can see the full details associated with the update here.