I made a second small WoW AddOn: MapPinAnnounce.
It's pretty trivial. Mostly to make creating the new Waypoints faster when you want to signal your current location.
Typing "/pin" will send "Target Name - WaypointLink - (x,y)" to general chat. Typing "/pin text" will send "text - WaypointLink - (x,y)". Where the Waypoint is your current coordinates.
I haven't added it to Curse yet. If you use WoWUp, I think you can point directly to Github.