BugMeNot, I think you're really going to like a new service from the same shop called PdfMeNot. (username: stateless password: systems until Thursday) It creates a Flash display of any PDF document! No need to download the document and launch another application to view it anymore - PdfMeNot lets you convert PDFs by upload, URL, bookmarklet or a script entered into a website's page if you're the publisher.Whether or not you're a fan of the great website registration bypassing service
I've added the bookmarklet to my browser toolbar and may never download another PDF again.
Unless I want to search inside it, keep it for my records or read it on my phone - but you get the idea, publishers push PDFs more often than they need to.
See also Issuu, which is more complicated and does other things, but also works magic with PDF files.