FYI - for Wicked house seats, if you manage to get a hold of the office and person who is in charge of them, they are in such high demand you WILL be asked who your contact is. And if you name someone and they're contacted (they will be) and its proved that you don't actually know them, your request won't be processed.
There is quite a back-up for Wicked house seats... you can put in a request but won't know about tickets up till a week before. Which is not ideal if you're planning on flying in. Of course, the "higher up" the person you know is, the closer to the top of the list you can get. It's always suggested to put in house seat requests for matinee's or tuesday, wednesdays or thursdays.
Also, you can put in a request for a house seat now for, lets say, a show in March... but the box offices can't accept those requests until the first of that month, so in this case March 1.
It's a lengthy process, and for Wicked, I know they go through a lot of checking to make sure they're not just handing them out to the general public.