Yesterday my copy of Photoshop 10 arrived and I have been playing around with it a bit. Aside from the vastly improved performance thanks to native Intel support by far the coolest time saving feature I have come across so far is the automatic photomerge option.
The image above is two separate photographs I took today with my k800i mobile phone whilst walking around Oriental Bay. They have been automatically stitched together with Photoshop in a process that took less than ten seconds. Overall the results are pretty impressive considering that zero user input required.