It has volume buttons on it. No more reaching across the desk for speaker controls. :D :D :D
Oh hey mine has those too. Eh might aswell list them all.
At the top, from left to right
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Sleep (Although I never use it, it's annoying when accidently pressed. I feel like taking it off the keyboard.)
Calculator
A circle of four buttons:
Play/pause
Back Forward
Stop
Mute, +, and - volume control buttons.
A gap with no buttons
A bunch of buttons I don't use, consisting of:
Internet
E-mail
Search
Backward
Forward
Favorite
At the left side, from top to bottom
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Cut, Copy, Paste. I use the natural shortcuts instead, as those buttons don't work in some applications.