I found the following very useful so far:
Videos: http://www.youtube.com/user/APFTrading#p/u/15/aokfEYtR0fc
Article: http://www.asiapacfinance.com/trading-strategies/Ichimoku_trading_system

The best website I have found to learn the ichimoku indicator is

http://ichi-mo-ku.com

The website owner Chris is a very talented ichimoku chartist and he has made his website very nice and appealing!