This lens is such a great lens and to think it would be discontinued is rather dissapointing. Unless, that is, the replacement covers more range with same or better aperture, same or better bokeh, and build quality. I use this lens more often than any other lens in my collection and plan on getting a teleconverter for it in the next few months. As of right now the latest "G" offering is quite dissapointing. Being that with the 70-200G + teleconverter you can acheive the same f-stop penalty as the new lens but gain an extra 100mm with the 70-200G.
Have a great day!