I saw this at Confetti and thought it would look lovely for an outdoor wedding. Its a sort of garden theme and could look quite oriental. The only problem is getting wire or strings strong enough so that the lanterns/decorations hang properly.
Whilst I was in Dubai, I saw some Chinese traders selling artificial hanging flowers. I know they sound tacky but they actually dont look too bad. They are cheap at 10 pounds a piece but shipping could be problematic as they are quite bulky. I also didnt get a chance to weigh them since they were hanging two or three feet above me.
If you wanted to stick to real flowers, this is a sweet arrangement:
Or this is another way to arrange hanging flowers if you are having the ceremony outside.