Howdy chowny,
What I am doing now for Kymaera is pre-rotating the images. Kymaera (and Emutron) used to blit the entire FE image into a vertically oriented bitmap, then rotate and blit the image to the screen. This was horribly slow, So I decided that if a user is really running a vertical or vertical-cocktail system, They shouldn't have any problems permanantly rotating their snaps,marquees, cabs, etc.. to a new orientation.
In the next release of Kymaera I'm about to upload, I have included a small utility program that you can point to a directory, and it will rotate all images in that directory to 90,180, or 270 degrees.
So now in the frontend, the only thing I have to rotate is the text, which is much faster than rotating all the images.
-PMF