Since the release of his new book Making It All Work, David Allen has updated the original GTD workflow chart to include the new elements from the book.
Peter Mara, an attendee at this year's GTD Summit, snapped a great picture of an updated GTD flowchart. The new chart includes an updated layout and elements from Making It All Work, like the 3-fold nature of work.
Check out the link to Peter's Flickr account below to get a closer look at the chart. If you happen to know where a PDF file of the chart resides for download or purchase, share the link in the comments—we've searched high and low to no avail.