After South African Airways joined Star, I never used my MP account again for Star Alliance flight mileage - South African Airways Voyager being my primary FF account. I also no longer fly UA, due to their "less than stellar" overall inflight product and service levels.

There is a fair amount of miles in the account, which I would not want to go to waste. Are there any websites out there where one can actually convert United miles to other airline FF plans or hotel reward schemes? If not, I suppose I could donate the miles to charity...

Thanks