Bruce Waltke has now clarified his position on evolution on the Biologos blog. Among other things, he notes:
Adam and Eve are historical figures from whom all humans are descended; they are uniquely created in the image of God and as such are not in continuum with animals.
Adam is the federal and historical head of the fallen human race just as Jesus Christ is the federal and historical head of the Church.
Evolution as a process must be clearly distinguished from evolutionism as a philosophy. The latter is incompatible with orthodox Christian theology.
It seems that the first statement denies universal common descent by random mutation and natural selection. Therefore, he seems to believe in some kind of limited common descent.
A previous post of mine on Dr. Waltke and his position on evolution and intelligent design is here.