We aren't fans of caps lock, and we don't know many people who are. Still, people who want to use their iPad to type yells can keep caps lock on by adjusting the settings. Here's how:
Go to Settings > General > Keyboard > Enable Caps Lock> ON
From there, you can double-tap the shift key on your virtual keyboard and type in all caps. Know that this works on all your iDevices.
We are still holding out for the day the caps lock key is removed from all keyboards.