For you number crunchers

There is a program called "SmallRoller" that calculates the percentage probability of outcomes on a die. Good for calculating armour penetration probability.

http://www.fnordistan.com/smallroller.html

I will search for more probability calculators for those (like me) who like to know their odds in percentages.

EDIT: after a little more looking I found an even better one: http://hamulator.genostech.com/?p=download

I used to look at percentages untill I got that 1/36 chance that two terminators die from two wounds a few times...
And other similar occasions have left me to think them wrong and if you play grey knights you must have faith in luck and if you don't have it then that's too bad.

As a note, you can easily set up anything you want in MS excel, as it has all the formulas you need. I have several custom spreadsheets that show they chances to wound/kill based off of opponents toughness/armor/wounds/save/WS, etc. If anyone is not mathematically inclined and would like to look at some of these odds, please just post what your looking for, and i'm sure someone can post the formula for you to play with.