Customizing Your Office Live Public Site
Tim Aidlin, Design Evangelist at Microsoft did some work for us customizing our Office Live demo site called Northwind Inn, which was built by my co-worker Rohit Puri - Rohit, you need a blog I can link to!
He did almost all of the customization using the Site Designer and Page Editor tools that come with your Office Live account. Tim wrote up a nice little post about what he did to customize the site. Thanks Tim!