If you use Ableton Live on a Mac, but don't have the money for a MIDI controller for some functions, consider mapping a second keyboard in Caps Lock mode to additional functions -- even a fold-up keyboard will work!
The Macs I've used have always allowed one keyboard to have Caps Lock on and the other to have it off, meaning one keyboard will still type lowercase and one will type in CAPS.
Ableton Live allows you to map both capital letters and lowercase, so you can map your computer keyboard (or laptop keyboard) to some functions (like triggering loops, sounds, songs, or EQ functions), and map the second keyboard, with CAPS LOCK on, to other functions (more loops, sound effects, etc.)
Mac OS X Hints
http://hints.macworld.com/article.php?story=2008081918101840