That's a really neat way of viewing and interacting with a PDF as part of a page's content. I've never seen it done that way before as most web designers simply open a PDF file or stream PDF content in the same or a new browser window making use of the Adobe Reader plug in which most web users have already installed.

From the page source I can see that it is using the free, open-source FlexPaper Viewer - visit http://flexpaper.devaldi.com/ and http://code.google.com/p/flexpaper/ for more information. I haven't looked through Snowcovered or the DNN Forge for a DotNetNuke module which renders the FlexPaper Viewer's Javascript block but it should be a simple one to create. If the PDF/SWF file referenced in the script does not need to be changed dynamically and if you need this capability on only a few spots in your site you should be able to inject the in-line script block using the HTML module. You will also need to load the flexpaper_flash.js and other associated script files on any page using this capability.

One downside that I see is all of your PDF files will first have to be converted to a Flash file (.swf) using a third-party utility mentioned on the FlexPaper website.

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Bill, WESNet Designs
Team Lead - DotNetNuke Gallery Module Project (Not Actively Being Developed)
Extensions Forge Projects . . .
Current: UserExport, ContentDeJour, ePrayer, DNN NewsTicker, By Invitation
Coming Soon: FRBO-For Rent By Owner

Will,
This is something I've been looking for as well. Have you found a solution? I'm surprised there's nothing in the store. I'd like something that would give thumbnail images of my pdfs and onclick open the inline viewer for print. I would appreciate any insight you've gained in your research!

Thanks,
Heather