That's a great idea, Koko, except that in a couple of years the person needing to transfer the money will be able to easily buy the bitcoins himself and send them home. Bitcoin ATMs and the like will cut out the need for other people to get involved. The person on the receiving end will be able to convert them back to fiat just as easily, or, for that matter just spend them as BTC.
I don't buy that. You could say the same thing about fiat money, but money changers like Western Union still exist. Such a service would be especially powerfull in parts of the world where bitcoins are not widely known about or used. If you live in such a place and you have access to bitcoins then you could provide a very cost effective service. I would love to team up with a UK based for the purposes of running remittances on behalf filthy rich tax dodging petroleum engineering expats.