I think a sender’s crosshair adds extra functionality which is not really necessary I think, because you can share a pin to do exactly what you are describing. By creating a pin of your current location and sharing the pin via SMS (pe link). The name of the pin, the selected color and icon is send over. (@geomagik: The Note is not shared though, which would be a nice feature.)
I agree that when sending a map center location it would be nice if a pin is created at the receiving end. Just like entering a co-ordinate.
@geomagik: It would be nice if you’re able to select the current position by tapping the position dot/arrow. By selecting the position dot it becomes a ‘floating’ pin which could be shared like a pin, and while moving you can see the actual street name in the info panel. Also, you could optionally show the GPS Info panel only when the position dot is selected…