Hi all, I hope this isn't inappropriate but I thought this might be of use to a few people. I work for a web design company that have created a new hosted stock library solution.
A few details you may find interesting...

• Extremely easy to use, both for you and your customers
• Space for 5000 high-resolution images
• Sell original, medium & small image files
• Payments go direct to your PayPal account, we do not take a cut of the payments!
• Sell in your preferred currency
• Batch upload with IPTC integration
• Add your own branding, content, CSS styling
• Variable image pricing policies
• Fully hosted - managed using just your browser
• Your own unique web address
• Your own Google Analytics code
• No contract tie-ins!

http://www.avidimages.net/

Demo:
http://jerryspictures.avidimages.net/