I just updated my personal site, the Papers section, with a nifty Flash-based technology from Issuu, which enables PDF files to be viewed directly in the browser via a rich, smooth interface. No more interruptive and annoying dialog boxes asking to download, etc.
If you do want to download a PDF, just use Issuu’s nifty tools for emailing, sharing, and copying the exact file URL.
Below are a couple screenshots as a preview. Enjoy!