Identify That Sparrow

So, since we received our Digital Camera, we’ve been taking LOTS of pictures.  We’ve gotten quite a few nice pictures of sparrows. I thought it would be fun to show them off here and then see what species everyone thinks they are.  I am somewhat new to identifying sparrows.  Having the Digital Camera has given me a new reason to start watching and looking at them.  I was certainly guilty of sometimes overlooking them, though I never viewed them as some do, as a nuisance bird.  So, here are the photos.  Who do you think they are?  Let us know in the comments!