"Today, John Battelle mentioned Blender Prototype put out by the guys at Waypath (I think). Here's how it works. The user plugs in up to 5 RSS Feeds and chooses the degree of relatedness to the content from the feeds for books from the Amazon database (Here's where the ads come in). So, the ads come from Amazon, but they are semi-personalized.

I tried to create a feed, but Feed on Feeds didn't like the Feed URL (I used my site, Jenny's, Gary's, and Jessamyn's for my feeds with very close Amazon book ads). If anyone can get this to work, let me know in the comments (and mention what books show up). This could be interesting." [Library Stuff]

Indeedy it could be. Of course, it would be even more interesting if the books came out of your library's catalog and linked directly to request forms.