[QUOTE=thehen] Thanks @vee41. Perhaps I should have been more clear, I meant easing in and out along the x and y axis, not zooming in/out.[/QUOTE]
Another Yann example I've been using for something similar: http://www.scirra.com/forum/clickdrag-to-pan-camera_topic45640.html
Something like lerp(screenPositionX, screenTargetX, dt) should work too. Or did I misunderstand, you wish to smoothly scroll the screen from X,Y to another X,Y?