Here's the first beta of the scale behavior as requested by Somebody. I'm fairly confident in how this turned out, so perhaps this will also be the final release.
Scale Behavior - v0.9b
Download Now(no example) - 98KB
This doesn't include an example(I'll try to get around to that eventually), but everything should be pretty self-explanatory.
First you setup your scaling animation settings in the behavior's properties. You can either choose to have this scaling animation played at the start of the object's life or start it later using the "Start scale" action. Alternatively, you can use the "Scale over time" action to do the same thing but entirely at runtime.
All scale values are given as percentages and scale the object according to the size of the current image. So if you have an object that is 64x64, but its image is 128x128, a scale value of 200% would set the object's size to 256x256.
Be sure to leave your comments concerning suggestions and bugs.