We've mentioned before the idea of creating a custom application that sits on top of Office Live and is tailored to meet the needs of a specific "vertical" industry such as real estate, construction or retail. Our technical evangelist Rohit Puri has created a new sample called the Inn Manager, which is designed for a hypothetical Bed & Breakfast inn. Learn more and download the sample & instructions from the Office Live team blog.
The interesting thing about this sample is it really walks you through the different steps of configuring a custom application on Office Live, both the web hosting side of putting up pretty web pages, but also the collaboration side of using Business Applications to help manage your business. He also did a screencast if you want to catch the highlights.