After looking at a few online printers, we wound up getting it printed at a local Kinkos. They put it on some kind of rip-proof vinyl, which our girl has already put to the test. It came to about $60, which I think is fair. We’ll have to see how long the colors hold up. If you’re looking for a more economical way to print, I think that PDFPoster will split it into normal size pages.
And now, I should go — there’s a birthday party later today!