I can't remember where I read this, but I recently read that the flat lid from a home canning jar works well for scraping the seeds and gunk from the inside of a pumpkin.
And it does work.
By the way, have you noticed that some people are fine with touching a pumpkin's innards, and other people seem to be made almost sick by it? Luckily for me, I'm from the first group. But I'm sure that this lid trick would help a little if you're from the second group.