I have posted previously about Excel and Python. Which led to my blog being a top hit for those terms for a while. Chris Withers has decided that there should be a central hub for reading and writing Excel with Python. This is great and should help provide a clearer story for Python and Excel (remember folks, these libraries are pure python, so you can generate .xls on your Mac or Linux (or MS) box).
As my brother noted if you are looking for professional assistance in generating .xls in python (or for that matter Python in general) feel free to contact me.