Jergnes gave you guys a little preview of trip and I really don't have much more to tell you, only more to show you.
70-200 f2.8L, 1/80, F2.8, ISO 200, 580EX on camera 1/16 + stofen omnibounce. BW conversion done in Aperture.
70-200 F2.8L, F4.0, 1/800, ISO 100
70-200 F2.8L, F3.2, 1/2500, ISO 100
17-40 F4L, F4.0, 1/500, ISO 100
17-40F4L, F4.0, 1/800, ISO 100. Colors adjusted in Aperture.
This photo was made in photoshop with a similar technique that action sport photographers use to create 'morph' photographs.
A quick how-to (some PS knowledge recquired) :
1.) open all the images in PS and make the first image you want your active workspace.
2.) open the second image select the entire image (ctrl+a) cut and copy the image over the first image.
3.) lower the opacity of the just pasted layer to ~30%. align the top image over the bottom image.
4.)bring the opacity of the second layer up to ~50%.
5.) erase the parts of the second image that are covering desired areas of the first image.
6.) repeat this process for additional layers.