For those of you that are interested, I ended up using Miguel Jimenez's approach to solve this. I had some initial problems viewing my blog in a browser after implementing this, but it sounds like my ISP fixed that by adding specific permissions to that DLL. One other note: add the httpHandler section BEFORE the .Text entry where they try to take over verb="*" and path="*", otherwise you will never let the HIP generator get processed.
All in all, I would say that the entire upgrade was rather easy. Now let's see if my spam problem goes away.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.