There are two ways theists view evolution:
1. They don't understand its most basic principles, and call it nonsense. (These are the ones that say, "How come there are still monkeys around?") These people are simply uneducated, and for the most part, have no desire to become otherwise. These sorts are pretty difficult to reason with, as they flatly refuse to even form an intelligent argument. They instead do the "La la la I can't hear you" manuever. So I don't typically bother with them.
2. There are other theists that are educated, and do recognize evolution as factual. Now these people... can be reasoned with. The only problem with them, and this is what I would argue with them... is that because they realize the 'creation' story is not accurate, as it's written, they attempt to "change" it. They say instead of seven days, maybe it was 70,000 years, etc. And this is what I debate with them all the time.
This backpedaling argument is akin to them saying "My bible has been proven false, soooooo, I'll just write a new one."
In this way, they are clinging to a belief, not based on the merits of that belief, but on the fact that it's the only one they've ever known. Rather than seek the truth, they scramble to hold onto the next best thing. Why? Because it's easy.
Edit - JustWondering - I think you're one of the most eloquent and polite Christians on YA. And I really appreciate that. However, I would like you to ponder one thing, based on what you said below...
The Bible... without question... was written by men. Yes, I know they were supposedly inspired by god. But who said they were inspired by God? They did! I could say the same, and under the right circumstances, people would believe me. Just look at how the Mormons got started. Consider that, when you say you don't believe in man's word. You are most definitely putting your faith in man, if you put faith in the bible... (I'm just going to post a question on this, not that I think of it)