no you have leopard. you are two operating systems behind dude. snow leopard is 10.6.x and lion is 10.7.x. oh and next time if your wondering when you click on about this mac then click more info at the bottom and then it will say the actual name of the operating system on the page it opens to
yes 10.6.8 is the latest version of snow leopard, but clearly not the latest operating system in general. From there if you wanted you would go to lion, the latest being 10.7.2, bringing iTunes Match, and iCloud in the latest update.