One of my current web design jobs is requiring the resizing of more than enough pictures, and then resizing again to create thumbnail versions. Fireworks and no doubt Photoshop can do batch image resizing, although last time I went through all the settings in Fireworks to do a batch image scaling process it died within two minutes (and that was before it had output the scaled images).
So along comes this web developer’s gem: http://www.rw-designer.com/picture-resize. A free batch photo resizing application, or to be more specific, an .exe icon you can drag pictures on and it instantly outputs the resized version. The .exe contains the size you want to duplicate the image into so if your .exe is named “PhotoResize800.exe” then your image output would be scaled to a resolution of 800px.
Fast, simple uncluttered and doesn’t even require an install. Easy to use so definitely worth trying out.