I've just used Photoshop because I've been too lazy to switch to anything else, but as my DVD business grows, I might look elsewhere. That being said, a lot of my resizing has been with images, so we'll just have to see if there's really enough benefit to me. I also need to see if the labeling software that came with my Epson R300 will accept PNG files. If not, I'll just create a template in PS for now.
I believe Rikter uses Photoshop as well..