Hi JVD,
Personally, I think abiogenesis (development of life from basic chemical compounds) is a reasonable hypothesis for the creation of life, although scientists haven't really explained it in great detail yet. That said, I think abiogenesis, if shown to be a valid theory, would line up with the Bible quite nicely - Genesis does say that man was created "from dust", and although I prefer to take Genesis literally (though, as a myth - I will explain this further for you if you like) and not read too much scientific into it, could it be that the "dust" from which man was formed was God's metaphor for basic organic chemicals, that only now in this scientific era we realise? If so, that seems pretty cool to me.
As for the differences between theistic evolution and atheistic evolution, on the surface it may seem as though we believe the same thing. Although it is true we accept the same things scientifically, it is certainly not true that we accept the same things theologically, which really has a great impact on how we view evolution. For instance, in atheistic evolution, the random chemical mutations in DNA which natural selections acts upon are seen as blind and unguided (due to their random nature). However, for a theistic evolutionist, random mutations are not seen as indication of a
blind process as they would for an atheist. We believe that God can use chance and random processes in a guided way, because as the Creator, anything that happens in the world is under his control.
Likewise, while an atheistic evolutionist would believe that the universe, as it can be naturally explained, does not require God. However, most Christian evolutionists would not believe this. Indeed, like all Christians, theistic evolutionists believe God is the "first cause" of the universe; i.e. without God's act of creation, the universe would not exist. Indeed, some Christians (myself included) go further than this, in that they believe the universe is utterly dependent on God, to the extent that without God's continual presence, the universe would cease to exist - a form of panentheism which is completely at odds with atheistic thought.
So yes, theistic evolutionists are definitely evolutionists. But we are certainly not atheists! If you are interested, I can go into a bit more detail. But in summary, basically I believe, as a theistic evolutionist, that the laws of nature were created by God, and are continuously dependant on Him. Although I accept evolution is a random process, I know that God ultimately in control of creation, as He is the one who
lets these random processes occur anyway

. And when I think about it, I cannot think of a God more powerful than one who can create the diversity of life that we see on this planet, and the immense complexity present in this universe, by seemingly
random processes. If there is anything in nature that demonstrates God's power, it is that!
Peace,
Nick