when my passport expired after 5 years last winter, i needed it quickly because i was leaving the country. i think the fee was exactly double of the normal passport processing fee, but they take care of it really fast (2 weeks i think, as opposed to normal 6-8), they give you a fedex envelope that you write down your address on, and everything gets taken care of from there.
i can't be exactly sure without checking, but i think i paid somewhere between 90-120 as a total for that service (including everything of course).