Last month, we mentioned that Konami’s Metal Gear Solid 4 for Sony’s PlayStation 3 was going to feature an iPod as an in-game item; now that the game is out, we’ve had a chance to see how both the iPod and Macs were used. It’s actually sort of surprising. As you may or may not know, Metal Gear Solid 4 is the latest in a series of military espionage and action games featuring a character named Solid Snake. The developers at…