7 years back, when I used to fly frequently on business and multi hops,
one of the courier service helped me ship my luggage from one office
to another.. hotel to hotel etc.. as a personal favor. It was excellent.
They come pick it up the evening before.. and have it at my destination
the next morning.

Couple of times they even re-routed my bag in-transit. It was excellent..
but I dont think i would be willing to pay a lot for it out of my pocket.