New Publication from ISBN with lookup in certain websites.

Besides the existing types of creating new publications it would be great to have the opportunity to give the isbn or lccn number.

In a second step BibDesk would have a look for this item on certain websites (Amazon, Library of Congress, German National Library and so on). After this a new bibtex entry (maybe one for each website) will be suggested. Now the user can easily pick the one which matches closest and if necessary modify this entry.