How to Type Matrices in Word 2007
Insert -> Equation
then, type \matrix ( a & b @ c & d )
The ampersand separates elements on a line, the at-sign separates lines. Type as much as you want, it all gets laid out beautifully. Nest the whole thing inside brackets of various kinds. Very similar to LaTeX. I’ve found that most of the LaTeX backslash commands work in an intuitive way in Word 2007. Lovely!