I LOVE this craft!!! I used this for our local moms group and it was a big hit!

Some notes:
1. Instead of using polyfil to give it a round shape, I unrolled some of the tp and rewound it around the middle-worked great!
2. When wrapping the tp roll, start by picking up the center of each side and tucking it in first. Then tuck in each of the four corners.
3. For the stem, we used paper lunch sacks that we rolled up tightly. You can cut off about 1/3 of the paper bag (from the open end) to make your stem skinnier. The next time I make this I will roll the sack more loosely and twist it (as shown in the video-link below).
4. I also made some smaller pumpkins by cutting the tp roll in half. It was a little difficult (I was using scissors), but they turned out so cute, so it was worth the effort!

This video tutorial is great!
http://www.expertvillage.com/video/32276_scary-parties-pumpkin.htm

Here is a photo (of some) of my pumpkins.
http://www.craftster.org/pictures/showphoto.php?photo=185819&ppuser=154643