The main takeaway is to use something other than color to convey information.
I suspect there will be a few people who would like the pie chart pattern to stress that pie charts can often difficult to read whether you are color blind or not, and should often be replaced by a bar graph or another way of conveying the same information. Unless, of course, you’re using the pie chart to make one point or to show how much pie you’ve eaten.
Joking aside, the Google Analytics example used in We are Colorblind could be replaced with a bar graph:
(I discovered We are Colorblind via swiss miss)