Brad,
I am not really sure how light has anything to do with speciation and the formation of new kinds. I took the following assumptions from the creationist camp:
1. God created the kinds, all species are derived from these kinds.
2. No other kinds have ever been made.
3. Organisms are not able to evolve outside of their kind, only adapt within their kind.
4. Kinds are defined by an interbreeding group.
I have shown, witht the above worm, that interbreeding is a discontinous process. In the worms, although previously one interbreeding population, are now not able to produce viable offspring. This is, by definition, a new kind. This does away with assumptions 2 and 3 above. If crossing the kind barrier is macroevolution, then this is an example of macroevolution, evolution above the level of kind and species.
It has been asserted by myself and others that the kind designation is nothing other than an arbitrary assignment of organisms to fit an already assumed hierarchy. What evidence says that common ancestory stops at a certain point? None. Kinds is something taken from the Bible and forced on to the data.