Looking for an easy online method of sharing and using powerpoint presentations?  Slideshare is made just for that.  Here is one I made of Middle Eastern flags a while back, showing the cultural patterns and similarities among the flags.  Students are quick to note that the Israeli flag sticks out and "doesn't fit in well visually."  

APR: I think that the cultural similarities are evident in most of these flags, although the proposed Iraqi flag seems discordant with their cultural heritage, at least according to my limited understanding of Iraq.
Via Seth Dixon