I love the first image for its unified look. The illustrations fit well with the type and everything flows clearly down the page (the humorous content is a plus too).
The second picture is an infographic produced for Help pharmaceuticals. Their goal as a company is to provide simple, straight forward solutions for everyday medical needs. Their packaging is simple and addresses the problem rather than product (i.e. instead of "Aspirin" their box says "Help! I have a headache.") I love their use of this infographic as a sort of advertisement. It places their brand strategy ("I have a headache") at the center of a slew of confusing medical jargon and ways to choose a pain reliever, reinforcing their brand as a simple solution.
The third and fourth images come from a wonderful infographic company called Voltier Digital (now BlueGrass). They've really got information design down to a science. Check out the rest of their stuff
Finally, I can't think about information design without thinking of this map of Napoleon's Invasion of Russia by Edward Tufte. If you don't know who Edward Tufte is, you should find out. His work isn't as flashy or "beautiful" as a lot of stuff we see because the data he designs for requires a more technical approach, but his ability to problem solve and arrange information in a clear and orderly fashion is astonishing.