For the Photoshop users that would like different dither method than the standard PS 1-bit Bitmap Dither, I found this freeware filter for different dither effects (Threshold dithering, Error Dithering). I have not fully played with it, but it does a great job on the Stucki and Jarvis dither that is found in CD Photopaint. Offers many different Dithering forms.
Jim
http://www.ximagic.com/g_index.html
(Go to "download & Info" to download filter)