I finally had upgraded to Outlook 2007 about a month ago and one of the features I found myself using a lot was the Preview feature for attachments. It was great for the PDF and the typical office documents, but there were no preview handlers for files such as WAV. I have a VOIP line that emails me the voice mail messages that have been left so having a WAV previewer would be really useful for me.
During my search for such a feature I ran across a great utility from Gil Azar (and in his post gives credit to lots of others for their help). You can download the ultimate Outlook 2007 preview handler from his site.
If you are interested in some of the technical details Gil discusses them on his page and provides some really great links.
I’ve included parts of Gil’s original post just in case his site disappears one day.
A self-extracting installer, which silently installs Stephen Toub’s MSDN Magazine Managed Preview Handler Framework and Gil’s small addition, can be downloaded here