If you are into digital photography and use a Nikon or Canon dSLR, Microsoft quietly released a Windows XP powertoy a few weeks ago that adds the capability to handle RAW files to your Windows Explorer. After installing this, you can view thumbnails of your RAW files and also preview the files. It does not however support preview in the "film strip" mode. A worthwhile download, and it is written in .NET!
http://www.microsoft.com/windowsxp/using/digitalphotography/prophoto/raw.mspx