Here's a better shot of the side intake grill and the locking latch.
Once you open the side panel you immediately will notice the purple "cone" that's attached to the side panel intake grill.
This cone when the side panel is closed positions it's self above your CPU heatsink and fan. The idea here is to pull cool air in from outside the case instead of from inside where it hotter.
Moving on to the inside of the case we have the tool-less sliding locking system for your cdroms, harddrives, and what have you. The case has plenty of room to fit most of today's motherboards including P4.
Also notice at the top of the picture is a power supply. The power supply is included, and it's a Sparkle 300 Watt.
Above is a better view of the tool-less locking system. You simply pull the slider, and push the lock tab up to secure your
cdrom's, etc.