As for the neanthers' homology with sapiens, lets wait a little. They're currently at 63% of completely mapping their genome. But the real relative question will be centered on the gene expression in the brain. This is the quintessence of what differentiates sapiens and homonids. If gene expression in neanthers turns out within similar levels as sapiens, then there is a serious creationist case, in spite of other physiological aspects.
However, this would not validate the underlying premise of a purist christian creationism, which is to deny the relationship between man and primates.
But now, here's one problem I have, since this thread is about humans and chimps. I'm trying to understand how is it that according to Hiller (2005), the "extra" centromere found in chromosome 2 is related to chromosome 13 in the chimp. Shouldn't that centromere be the one from either chimp chrom 2a or 2b, since they constitutionally form chromosome 2 in man? How did chrom 13 in chimps get in this equation?