The issue flow feature is designed to pull data directly from the pdf management portion of Linear. Each item in the issue flow can link directly to it's PDF or Flash counterpart. The PDF portion of Linear can be subscriber bassed.
Once configured for your site, you simply add new images to the issue flow at anytime. Also, images can be assigned to more than one flow - so, you could have a flow for current issues and flows for recent archives of individual publications.
Each issue flow is fully customizable from background images to flow speed.
for an on-site example the pdf management listings.