Now you can upload, preview and share PDF files using Google Docs. Editing of the PDF files is not yet there, but you can copy & paste text from them.
This is the most requested feature for Google Docs, PDF support will be liked by most of the Google Docs users as this is the popular format for sharing documents with others.
To upload a pdf click on upload and select PDF file from your computer or provide a web url to upload. Maximum file size you can upload is 10MB from your computer and 2MB from web.