http://www.forbes.com/2009/02/05/alfred-russel-wallace-evolution-opinions-darwin09_0205_michael_shermer.html
An interesting article, dealing with some conspiracy-esque claims that Darwin didn't actually come up with the idea of evolution first. It lays it to rest quite soundly.
I also disagree with the thread's premise, btw. It's main premise seems to be that Newtonian physics is used to distinguish it from another kind of physics, and therefore 'Darwinian evolution' implies a different kind of evolution, which is just patently silly. No such thing need be implied simply because it does in another instance. Are we creating a lexical rule based on a single example?
That creationists try to make it into a negative term is also no reason to drop it. Creationists would turn any buzzword into something negative to bolster their cause. Removing the label Darwinism would just force them to do the same thing to a different word or term.
As it is, Darwinism has been used for decades now as a commonly-accepted term that conveys a clear idea to those who encounter it. It's perhaps a needless label, sure, but also not a harmful one...or no more harmful than any other distinction would be. And beyond that, Darwin's original theory has been heavily modified and added to in the years since its inception, but the core elements (gradual differentiation via natural selection, divergence of species, etc.) remain intact. Therefore, it is not even a term that is misleading, for it does not point us to an archaic theory that has been disproven, but to a few basic principles that have since been broadened and supported with mountains of evidence.