Here’s an article of mine published on Smile Software’s PDFpenPro blog: Deep Linking to PDFs with Hook and PDFpenPro. You’ll notice that it mentions @MacSparky’s contextual computing concept and links to an article and links to an article of David’s on it. I highly recommend Dave’s concept and article.
Please feel free to share your deep linking use cases , screencasts. One of us will follow up with a screencast.