Last Saturday Tim Spalding, from LibraryThing, posted about how you can use Google Book Search as a source of cover images. You can read all about it at the Thingology blog. Tim says that the code is a little rough, but it does provide a working example.
With this technique for getting book covers from Google [...]

The State Library of Tasmania has recently introduced LibraryThing tags into their next-gen OPAC TALISPlus
Try it out - go to Bridget Jones’s diary and click on the Similar/Other/Tags tab - you can then choose a tag like ‘chick lit’ and see the State Library’s holdings in that genre - lots to explore!
Initial feedback has been [...]