Baggs
Perhaps we should go back to bowing and curtseying.
Yes indeed. We've just watched "Sense and Sensibility" again, and I loved the way they all bowed and curtseyed to each other - just small ones, not exaggerated, and I could live with that happily. 
Elbow bumping looks really stupid IMO (and as usual Mr Johnson looks embarrassing when he does it with his hair messed up and his shirt hanging out) and I agree with those who say that an appropriate greeting and a smile are all we need. Although the bowing and curtseying could catch on...