Our house isn't air-conditioned and it's not too bad since we live on a shady street. But I'm thinking of buying a ceiling fan for our bedroom, just to get the air moving. Any hints? We've already got the place for it since there used to be a light fixture in the ceiling and I know I'll have to get the 'ceiling-hugger' type (close to the ceiling with no pole) and no light fixture. The bedroom is pretty big -- it runs the full width of the house. What do I need to know before I go shopping? And is a ceiling fan really worthwhile?