The guys from ARS Technica have taken a look at Microsoft's Windows Home Server:
At first glance, Windows Home Server seems built to scratch an itch that doesn't exist. When Microsoft set out to make the business case for Windows Home Server, it quickly focused on a very specific target market: "Households with a broadband connection with 2 or more 'active' PCs that are sharing the internet connection." Additional research showed that on average, the majority of these households also had a digital camera, color printer, and a game console, but less than 20 percent reported feeling secure with their backup solution.
With Windows Home Server, Microsoft wants to simplify how your files and backups are stored. So far, so good, but what about the additional features: remote access, media sharing, etc.? Are they a tacked-on afterthought, or does Windows Home Server make everything play nicely together?