arcgis 10.0 - How do I use python to batch process the reprojection of a group of shapefiles?

My client would like his shapefiles reprojected and I would like to get a script that can batch process all the files located in the same folder. I am new to Python and ArcPy but am very interested. We are using ArcMap10 as our platform software. Any help or advice would be greatly appreciated.