Home Brew Forum

This is one of my favorite links. It is actually a list of more links, all are about yeast, but if you scroll to the bottom, you can click on any topic and will pull up a page of links for that topic. Great stuff here, but some of it is dated info, but much is still good!!
http://www.goodgulf.com/yeast.html

Here is an excellent pitching rate calculator although you have to convert your wort volume to US gallons