I had a similar experience to that of the original complainant, although the fee to Orbitz in my case was over $80 for a two-day stay. I suspect I could have booked the room directly for less than $100/night. In hindsight, I should have checked directly with the hotel, but I was making some last minute changes in a trip due to flu and did not make the effort. I protested what I considered to be excessive charges directly with Orbitz, as well as through my credit card, but got no relief. I have therefore chalked it up to experience and will not make the same mistake again. I find Orbitz marketing materials misleading, in that they imply that the consumer saves by using them, which is clearly not the case. I agree with the complainant that there is no disclosure of how fees are established. However, I suspect that there is nothing "illegal" about their practices--maybe unethical, but unfortunately the law probably does not prohibit this type of practice.
Although I doubt I will ever use Orbitz again, if I do, it will be only after confirming that I cannot get a better rate directly with the hotel or through another agency. Based on what I have experienced, I doubt that will be the case.