What keyclone does is when you push k on your druid it pushes k on your lock. So.... you can hit 4 to charge in on your druid then hit 5 6 7 on your druid and your lick will cast what ever is bound to 5 6 7 so think of binding half of your keyboard with druid buttons and the other half with lock buttons and a few that will make both toons do something diffrent at the same time.

Let's say you have feral charge set to 2 on your druid and curse of agony set to 2 on your lock. with keyclone when you hit 2 your druid will charge and your lock will cast curse of agony at the same time.

when you jump they will both jump, when you /dance they will both dance when you /lol they will both laugh. and i thin you have enough examples. =p