@mmchugh - Thanks for the examples Mike. You're correct that "My Halo at Half-Light" is not in any of the databases yet that CDpedia has access to, probably because the album was only released recently and sites like Wikipedia and Freebase haven't picked it up yet. (Amazon does have the data since they sell the album.) I've added the entry manually to my collection and contributed it to Doghouse so the album will be found there now.
The whole idea behind the Doghouse is to get passionate users like you to help us make it the greatest online repository for all Pedia users. To this end, we need detailed and well-researched entries so that every single user can benefit from it. Those who went before will not only have the eternal gratitude of the community but will know that they helped forge the future of our software.
Currently, user submissions are not public, but we could change that as an incentive for users to contribute more and better entries into Doghouse.
"Netherland" I found without trouble on several different websites, including Doghouse, Freebase and Wikipedia. (I did a search by title since I didn't know the ISBN.) The ISBN on Doghouse is for the British edition but Freebase has the US hardcover edition, with ISBN.
@Spacemodeler - Unfortunately if Amazon doesn't allow the Associate program in your state there's not much we can do about that. You could try using a placeholder text as the only IDs that are validated seem to be the Access key and Secret key.
Have you tried some of the other search sites though? Click on the magnifying glass in the search window to select a specific site and if it has a limiter (the 'Limit To' menu at the bottom of the window) make sure you select one to fit your needs, such as Title or Author.
At the top of that search window you can see which site is currently being searched, in this screenshot for example it's Freebase.