What it is:    Museum Box is a website that I heard about through a tweet on Twitter a few weeks ago that is really impressing me today (that is saying a lot since today is MacWorld and they are announcing big things!).  Museum Box is based on the work of Thomas Clarkson who collected items in a box to help him in his argument for the abolition of slavery.  He collected items in a box to demonstrate to others the fine craftsmanship and abilities of the African culture.  He used his box as a sort of travelling museum to aid…