I considered believing in both the bible and evolution when I was still a dub, but I can't figure out how to mesh the core message of the bible with the fact that evolution happened. At the core of the bible is the first human pair / original sin / need for Jesus concept. There would not have been a clear "first human pair" with evolution.
Now there isn't a reason why evolution and "god" have to be mutually exclusive, but it wouldn't be the god of the bible IMO.