Well, I'm not saying it's done in FT or anything

, but you
could find your own circles of friends or family members that could need to fly somewhere using your miles...@:-)
Later, should you need something from them, I am certain this would be something you could all work out. No need to tell the airline about your little inside gig--it's commonly done but you just don't blare it out there (ie, getting a ticket for your mother... it's obvious she'd probably bake you that nice apple pie for it, but is that bartering or just being family?) Again, I have NO idea if this stuff happens but it certainly should not be a crime to just THINK of it and post the thought in here, now should it?
I mean, in one's own life, there ARE ways to get to know people in need who could help you out--say, if you happen to like to fly AA and have no miles on them, but a person who likes to fly UA wishes they knew you...
***
Should you keep it all closer to home, however, I think if I had that many miles laying around, I personally would take a bunch of trips to places I might go if I could just do it with little care in life. I'd also say to do this now before you have 2 newborn babies and no time, or you lose a job or get sick for some long period, or before gas prices go so high we enter a new and tighter era and maybe some global war or climate problem where India is no longer on the map or some volcanic event sinks Maui...
Maybe donate them or something. I dunno.
Why, what if you were to pick up a hot girl at that local night club and use the fact you could fly her anywhere ASAP as THE pick up line to get her attention!
GOing firther, you
could even start some sort of customer advocacy business whereas, when people have missing or delayed mile issues with the airline you have so many miles with, you can help them out by providing award tickets for them.
This would be useful in that they would now not have to wait months on end dealing with evil customer service of third parties and partners to finally obtain whatever missing miles they need to get to an award level in their own accounts. (yes, like many here, I have had this problem countless times)
Then, when these people finally DO get their miles and have enough for their own award tickets they were trying to book with those often significantly delayed miles, they can return the favor to you by booking something for your needs with their awards, but they also add something to it for your benefit. ie, you become a sort of mileage junkie loan shark
Maybe you could even find a way to get the airlines to LET you be their rep in this area, thereby alleviating them of having to deal with pissed of customers. Such a thing would take some interesting negotiation, but surely, a customer helping another customer would be better for them than having several customers become upset and arguing over some missing miles that take too long to post. It would all come down to your presentation.
Just don't let them go to waste and please
do be creative no matter what you choose.

MM