My friend, VadeRetro, can provide you with numerous links to a load of such evidence, and he probably will, as soon as he gets this ping. The progression of skulls from the early homonids to our own wonderful species will astonish you. And it's beyond dispute that we share a tremendous amount of our genetic material with other homonids, more so than with any other species on earth. But even if you don't find such evidence persuasive, it's still the only game in town. There's literally zero evidence for any other origin for man. (Mythology and conjecture aren't evidence, I'm sure you'll agree.)
Can you give an example of an on-going, cross-species evolutionary process that is under scientific study or has natural evolution ended?
Ah, but therein lies the rub. We see progressive new varieties of skulls in the fossil record just as we see progressive new varieties or automobiles buried in junkyards, yet we'd be foolish to say that there is literally zero evidence for the non-natural, unaided, non-intelligent origin of cars!
In other words, just because we see evidence of speciation does NOT mean that we see evidence of how said speciation was formed. Sure, it could have been natural (ala Evolution), but it could also have been un-natural (ala Intelligent Intervention).
It certainly isn't out of the realm of possibility that DNA can be designed and programmed via Intelligent Intervention (think, gene-splicing for an actual scientific example of this very thing already being done by Man), after all!
So let's not try to say that there is only one possible answer, and that answer is Evolution. We have clear evidence of gene-splicing by Man that shows that DNA can be programmed by an Intelligent Intervention, so clearly there are at least two possible explanations for speciation.
Am I clear enough on this point? Contrary to your claim, there is more than one game in town...