Some good advice for designing scientific posters:
The best general advice I can give a first-time poster constructor is to describe the circumstances in which a poster will eventually be viewed: a hot, congested room filled with people who are there primarily to socialize, not to look at posters. Because poster sessions are often concurrent with the “wine and beer” mixer, chaos is further increased by hundreds of uninhibited graduate students staggering around hitting on each other. It’s not a pretty sight.
If you use Keynote on a Mac, note that Apple has published some great templates.
Link via BoingBoing.