If you like to learn to speak Chinese, Mandarin in particular, this is a site to subscribe to, based on the ever-increasing popular podcasting.
Here are some more resources if you are interested:
Learning Chinese Online from California State University at Long Beach
Chinese Characters and Culture: Wondering how Chinese look up the words in a Chinese dictionary? There is an interesting Chinese character map in the right lower frame to give you some clue.
Dragonwise series 現龍系列 from one of best friends: Wing-wah Ki.