One of the cooler Vista features that I've started using more often is the File Preview in Windows Explorer. Being a developer, most of the files I work with are code files of one form or another. I didn't think there was any reason to use the File Preview feature... until I came across a couple of Preview Handlers that caught my attention.
I also came across an article from MSDN wiz Stephen Toub. He built a simple application that lets you edit the Preview Handlers associated with a particular file type. They're very useful, but unfortunately the code does not work on Vista x64 (dang that phrase is WAY more common than it should be). So I took his code, and made some adjustments. The cool thing about Steven's utility is that you can use it to extend the Code Preview Handler Pack listed above to process .ashx, .ascx, and .asmx files as well. Anyways, I've posted a zip file containing the executable, as well as the modified source code.
So do you know of any cool PreviewHandlers? If so, please share!