A few days ago I went to a fun lecture 'From test tube to YouTube', given by Professor Martyn Poliakoff from the University of Nottingham. He has a YouTube channel, and a website with a short video for every element in the periodic table. If you were interested in my post on Carbon, I definitely recommend his video for carbon. He and his team have also made videos relating to topical events like the olympic games, Nobel Prizes, and the nuclear accident in Japan. One of his most recent videos, and apparently one of his favourites, is this one where he cuddles a koala and talks about the chemistry of eucalyptus oil. He is also very well known for his chemistry themed ties, and his hair! He is now in the Guinness Book of World Records for the world's smallest periodic table, etched on one of his hairs.
The physicists at the University of Nottingham have also got in on the act and also have a series of videos about some of the symbols used in physics.
All very geeky and fun and I've just wasted a lot of time watching!