I made it for the first time last weekend. I added the 60 oz of canned pumpkin (baked previously in the oven). I put it in the last 15 minutes of the boil in a paint strainer bag. It gave the beer a wonderful orange color, and even after 6 days fermenting, i can still smell some pumpkin aroma. It is a bit messy, and i would like to try it with real pumpkin sometime.
Sounds like it is awesome without the pumpkin too!