Well actually, jsut A keyboard.
before i used my laptop keyboard with an extra screen so i was running two screens. but that made the computer run extremely hot when i was playing games or multi tasking (we're tlaking like four or five broswer windows plus iTunes and usuually ichat or another chat program.
but now that i have this new keyboard and got my mouse replaced a while back, I now run one 21" screen with the external input devices. the computer runs so much cooler now. its nice
i got the standard apple keyboard.
i thought about getting the bluetooth, but decided against it because i didn't like how hot the computer ran when i was using bluetototh with other devices (mouse and phone sync-ing) so i just got the wired one.
I love how it sounds and feels when I type on it, as opposexd to the loud clicking of your standard windows keyboard. not to mention the nice clean look.