You'll want to change the shape of the of the animation.
Open up the Advanced options under the Animator, choose Ramp Up for the shape and then animate offset.
Cheers. Actually just stumbled on that about 3 minutes ago. Thanks.
Here's a crazy question, is it possible to use the text animation tools, but use say a precomp or an animation instead of text? Basically, I want to use these tools to animate imagery...
The text animators are for text. You'll need to use other strategies to do it for images.
Animating the scale of several stills in sequence comes to mind immediately. Position the stills appropriately, animate the first still until it's right, then you can copy & paste the scale animation to the other layers & move keyframes accordingly.