I have a new viewer for my PDF files: Google Docs, which now supports PDF files.
It must be embarassing for Adobe that I find it faster to view a PDF doc over the Internet in a Web browser than using Acrobat on my computer.
The drawback to Google Docs is that I have to first upload any PDF file I want to view through Docs. But uploading to Docs seemed faster than using FTP or email to transmit PDF files. For now, I uploaded all of my ebooks -- around 40 of them. A bulk uploader would have been helpful.
Next thing Google needs to implement: seaching through PDF files.