I suppose it's a good thing I didn't delete the RSS feed I had for the now obsolete .Text forum on ASP.NET. That's because this morning, it alerted me to this new post - http://asp.net/Forums/ShowPost.aspx?tabindex=1&PostID=812687.
It seems Arian Kulp has built a bulk image uploader for .Text image galleries.
What a clever idea, Arian! You can get the code and find out more about it at http://ariankulp.com/archive/2005/01/29/14.aspx. I will be trying to find some time over the next few days to give this a shot. Great contribution!