meh, once again, another misinformed poster whom has not seen the evidences for speciation, this
link is very detailed, fully source cited will contain a lot of what you need to know.
As for;
"The argument "well, we have had billions of years for evolution to happen" doesn't cut it because random effects cannot produce the changes seen from protozoa/bacteria to mammalian forms in this time span. Nearly everyone admits that most random effects are counter productive, for example."
Evolution isn't random, natural selection is anything BUT random. Mutations on the other hand are random but as you know, they themselves alone do not constitute evolution.