Hi,
Sorry for the late entry, hope I don't get marked down for it
I have finished my entry.
I use CS4, (bit out of date I know) in a similar way to H.Quengler and Brian_e.
Seeing as their wasn't much to use for creating cleavage, I had to use a donor image. This was used to bring in the boobs and bra into the image, where I played with the size and shape originally with Tranform> Warp and a bit of liquify tool. Once happy with size, shape and position I went onto sort out the colour and shadows.
I also tweaked a few parts of her body as I'm not too keen on the muscle look, so I toned down her arm muscles. I gave her a small lip enlargement too, give her a bit more of a pout.
I think this is a great idea and in the future I will try and keep to the deadline.
Very good entries so far too. I'm looking forward to seeing the other entries.