While I'll agree that currently evolution and abiogenesis are two distinct things in the scientific community, they are both undoubtedly driven by the same mechanism... natural selection - and if that's the case, then perhaps the field of evolution can be broadened to include abiogenesis.
There are problems in all the hypotheses surrounding abiogenesis, but considering that the primordial seas were as much as 30% comprised of organic macromolecules/polymers, and you only need one self-replicating RNA strand to spark natural selection (in a sea of trillions upon trillions of RNA molecules, given 500 million years to brew), it's clear that at least the principles of evolution are inherent in abiogenesis. Wikipedia has a great entry on abiogenesis if anyone's really interested.
Here's an awesome and interesting article on just this subject which could turn the abiogenesis field on its head:
Did Life Evolve in Ice?
(I'm a Bio major, though I haven't taken any classes on evolution yet... I have studied it independently to answer my own questions.)