There is a PHP version of PhotoPost. Since many of the vBulletin.org Master hackers are PHP gurus, this should make it easier to code a hack like this... One of the gurus (I forgot his handle) works with vbPortal and he could probably help us with this.
There are so many advantages to having a hack like this that I hope someone will step up to the challenge!!!
Original Example:
http://www.airstreamforums.com/photopost/
Andy