Edward Tufte is rightfully famous for his books on graphics. There is thread on his Ask E.T. forum that specifically deals with poster presentations. There are many good thoughts and links contained within. (And I say this not just because I wrote a couple of the posts in that thread!)
I have no doubt that Tufte’s name will come up in many subsequent posts in this blog when the matter of designing graphs for posters comes up.
The Evolution of Chromatic Type
3 weeks ago