Question about animation

I am sorry i don't have an example but maybe someone will understand this...I had seen a few icons around LJ with text on them and one word swirls out of focus then back into focus. I had looked in the mems here and didn't see anything like this so i thought i'd ask if there was any tutorials on how to do this?

Any help would be really appreciated
Thank you

I use PS7 and Image ready if that makes a difference