[Did I really hack it?]

http://wtfmoogle.com/wp-content/uploads/2010/05/DJHImanual.pdf

 

That manual looks incomplete - but seems to say those six pins are a UART - I think you need an adapter to connect it to a PC.

 

From here: http://elinux.org/Didj_gpSP_GBA_Emulator

 

It looks like you do need the UART to get the emulator working as you have to flash your bios I think, see http://elinux.org/Didj_U_Boot_Flashing_Primer

 

All looks quite complicated to me!

[Gamecube mods]

Would this do the trick?

 

http://www.amazon.com/Datel-GameCube-Freeloader-U-S-Consoles/dp/B001RY2BA0

[The longest song ever made]

Sorry dude, but you might want to check these out...

 

longplayer.org - "Longplayer is a one thousand year long musical composition. It began playing at midnight on the 31st of December 1999, and will continue to play without repetition until the last moment of 2999"

 

http://bullofheaven.com/

[Guess that game and system - Question 9]

I recognised the character and was about to guess the system, when I accidently hovered my mouse over the image - you might want to change the filename