The Geek/Nerd/Dork/Dweeb Venn Diagram (via Joel Esler’s blog):

BTW, here is a quick way to convert JPEGs which should be PNGs or GIFs (because they aren’t photos!): simply use a photo editing software (like the GIMP or IrfanView / Paint.NET) and reduce the color depth without dithering. This should pretty much get you there. You might want to play around with the number of colors to retain.

The second one is Pixels by Patrick Jean (via Wondermark):

MC Frontalot released his newest album Zero Day (via the Veracode blog):