Well the Piccolo here is quite different from the one I know back home. He's much younger here, and far more ill-tempered. Hmmm...lets see how the simplest way to explain this... Um... well... Namekians have an interesting ability to um... split in two, I guess that would be the easiest way to explain it. Well when Kami split in two he created an evil counterpart, Piccolo Daimao. Now while they no longer share the same body, they are still one being, if one dies, so does the other, and the power of the original Namek is distributed evenly between the two halves. The Daimao reeked havoc upon humanity but was eventually defeated by a small boy named Goku. As a last ditch attempt at revenge the Daimao created a son who was in essence his clone, that son is the Piccolo you know. Now that son took the Daimao's place as Kami's other half.

So Kami is Piccolo's brother?...or maybe his uncle? or his father... or perhaps grandfather.... erm.... oh dear I just went off on a tangent didn't I? um... did you get any of that at all?