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
• Sell original, medium & small image files
• Payments go direct to your PayPal account, we do not take a cut of the payments!
• You prices of course
• Sell in your preferred currency
• Batch upload with IPTC, XMP integration
• Your own branding, content, watermark, styling
• Fully hosted - managed using just your browser
• Use your own web address
• Use your own Google Analytics code
• No contract tie-ins!!

Free 100 image tier, check the site for more, up to date details.
http://www.avidimages.com/

Demo:
http://jerryspictures.avidimages.com/