Album art
The system often doesn't find album art when a certain size is set. You can easily program a script that uses the 'search in Google' function through the Google api. It will search the image database for similar images. You can then program a function to pick the nearest image from that list. This is the easiest method to automate image searches.
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Bert Beukema
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We used to do this, but Google stopped allowing it a couple of years ago (maybe more).
Maybe something like this would be close: http://ideas.blisshq.com/forums/21939-bliss/suggestions/6735620-automatic-google-image-link-in-the-provide-a-url