The USB ports? They're used to plug in microphones, Rock Band's (soon GH4's) drum kit, and headsets for online gaming. I think some old online games were compatible with a USB keyboard too.
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Used for connecting a USB HDD, and running ISOs/games off it, if you use Swap Magic or have some kind of memory card exploit to run off it.

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Quote by 05t16
1.Take USB
2.Bin it
3.Buy PS3

That would mean no profit, it would mean losing money, since the PS2 is worth way less than the PS3.
This man fails.

I've used that port to plug in my guncon controller for the Time Crisis games, and the rare time when I've felt like it, my Dance Dance Revolution pad.
Quote by leeb rocks
you could run homebrew off it, they were originally used for a keyboard and mic for socom i beleive
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You know why?
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You can charge your USB connect-able MP3 player with it.
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