Don,
Seems like a lot of work and expense for little reward.
Damn you 
Duane, it was done for a few reasons on mine.
I liked the idea of finally filling that empty switch cap with something functional.
I didn't like all too regularly locking and unlocking the saddlebags seemingly everytime I stopped someplace
It seemed like it would be a nice convenience addition.
It was surprisingly inexpensive to do (all tolled about $275 if I remember correctly).
Harley said I couldn't do it.
No one else had it.
Harley said I couldn't do it.
Having used it for little while now the convenience factor is actually pretty nice. Power is on only when the switch is on. So no one can just walk up and push the button anytime. The only downside to that is you have to more diligent (than I often was) about actually key locking the ignition switch.
All in all it was a fun chore one weekend. Ended up as a nice neat install and actually added a bit of convenient functionality to the bike.
A few have asked about the harness. I ended up recently grabbing some relays at a local automotive electronics shop and ordering a bunch of terminals and connectors. When they get here I'll have enough stuff to make up a dozen harnesses. Will see if anyone here is still interested when I get them made and then combine them with an information packet for the job and sell the rest on eBay.