To help photographers manage their images on iStockphoto, two applications have been built, they are currently Beta versions.
Description: Enables photographers to manage their images locally, viewing image details/status, and batch uploading images to iStockphoto.
More information about this application can be found here
iPhoto 6 plug-in 1.2.1
Version 1.2.1 with Mac Intel support
Description: Enables photographers to batch upload images to iStockphoto from the export menu in iPhoto.
Download Macintosh Installer