tangor - 4:10 am on Dec 10, 2011 (gmt 0)
For the last three years, G (Bing to a lesser extent) are reading PDFs okay, but to OP's original question, best I can offer is that G/B do read links... and a PDF is a link... in iframes. What value can result I cannot say. I only use PDF for a print specific structured presentation of an equally available HTML file, ie. I present both.