Hey Andrew – Generally I would say there are at least two basic types of inforgraphics. 1. Long flowchat style (4 Winning Tips for a Successful Job Interview infographic), 2. or one page with some visuals and minimal data (500+ OpenGov Projects).
The longer flowchart style ones are fantastic, and great link bate. Essentially you create a box that allows people to embed it on their sites, blogs, etc and it creates an instant backlink to the host. Thus increasing your page rank on Google/Bing.
The shorter, one page briefs are better for printing and handing out during presentations or at live events.