Thanks for the comments everyone!

In October of last year, four new galleries were inaugurated at the Museum, in line with the "Doha, Capital of Arab Culture 2010". (http://www.facebook.com/photo.php?fbid=144838702253274&set=a.14483848225...) And Sheikh Faisal is constantly adding amazing new items to his collection. So even if you have visited the museum before, there are definitely new things to see.