Also, if you are running Office 2007 it will automatically create a Bibliography in the correct format although it only does in-text citations and does not format footnotes.

I have been using 2007 for almost a year now and love it.  The only bad part is that you have to save it as a 2003 or earlier file when you turn it in at school.  Sometimes that causes minor formatting changes but nothing hard to fix, at least so far for me.