An interesting and direct infographic from New Scientist reports that spam emails have something like a 0.000008% conversion rate. Seems small, but a single botnet produced $3.5 million dollars worth of sales.
AppAfrica has an interesting post showcasing an infographic describing the state of the internet in Africa: Infostate of Africa. I took the liberty of uploading this to SeaDragon which allows for better browsing and appreciation of this type of resource. Note that SeaDragon doesn't get the centering of the image correct, so hit the home icon to see the full thing.
I'm a sucker for isometric infographics. Randy Krum at Cool Infographics points to this tutorial by Wendy Ding. What interests me is how organic the process is. Note also the intentional 'Where's Wally Effect' by design.