If you are looking for a template, or at least some nice backgrounds, this site has a large collection (250+) of PowerPoint templates that are free for download. Better yet, there is no log-in, capturing your email address or any other ill marketing stuff. You do have to endure pages full of ads, but that’s it. Take a look at www.freepowerpointdownload.com
The templates are nice, but very simple on the formatting (eg. you will probably want to adjust things on the Master Slides). Here is one I downloaded from the Christmas themes to preview the quality:
– Troy @ TLC