Tim Heur has released a free PDF file attachment preview handler for Outlook 2007 using the Foxit PDF SDK. This utility allows you to preview PDF attachments in an email in Outlook 2007. One can also preview the PDF files in Windows Explorer in the Preview pane. Currently, both these functions work on Windows Vista only. Tim is planning to release a version for Outlook 2007 on Windows XP at a later date.

Via Scott Hanselman’s Blog

Download from here

Update: A PDF Attachment preview handler for Outlook 2007 and Windows Vista using Adobe Acrobat Reader 8 is available here