Hi TheGrave,
In fact you can click inside the VI console of the Virtual machine, and then switch your monitor to your VMDP VGA, (assuming you have assigned a VMDP vga to your VM) and you will actually see the cursor moving there which is very funny considering you "left' your input to the VI console.
This is very buggy though (slow moving and jumpy cursor ) and you also need a second PC to launch your VI console.
So the best way to do this, as Dave mentioned, is to VMDP a couple of USB ports to your Virtual Machine and attach there a pair of keyboard and mouse.
Now regarding both inputs and sound output In my setup I have my ESXi 4.1 running happily, and i have VMDP one usb port (this is because I have a PC along with my ESXi and i use a KVM which has the keyboard and mouse attached) one ATI 5450 VGA adapter, one creative labs soundblaster audigy and the onboard firewire which I have not tested yet.
Input, sound and graphics all work great. For the sound I couldn't VMDP the onboard sound card as it was crashing my ESXi for some reason, so I just plugged an old good soundblaster audigy that was hanging around 
Regaring which usb port to VMDP which actually means which of the usb controllers to use, you will have to do some trial and error until you find the right ones. I recommened to try one or two usb controllers each time and not all at once.
regards
Theo