Heres a quote from lottocoin website. I wonder if KDC_Dave could look at their source code and see how they are generating random super blocks?

LottoCoin - The winners choice [LOT]. LottoCoin is a p2p crypto coin based on scrypt PoW, descendant of Litecoin which uses random block features. Initially it creates random coins between 256 and 65536 (256*256) coins per block. It also generates random superblocks where miners can win big!