The ISBN DB provides a remote access API that will return various meta data formatted as XML. From browsing entries on their website, some of the ISBN entries include edition information as well.
Check out this API sample response:
<?xml version="1.0" encoding="UTF-8"?>
<ISBNdb server_time="2005-07-29T03:02:22">
<BookList total_results="1">
<BookData book_id="paul_laurence_dunbar" isbn="0766013502">
<Title>Paul Laurence Dunbar</Title>
<TitleLong>Paul Laurence Dunbar: portrait of a poet</TitleLong>
<AuthorsText>Catherine Reef</AuthorsText>
<PublisherText publisher_id="enslow_publishers">
Berkeley Heights, NJ: Enslow Publishers, c2000.
</PublisherText>
<Summary>
A biography of the poet who faced racism and devoted himself
to depicting the black experience in America.
</Summary>
<Notes>
"Works by Paul Laurence Dunbar": p. 113-114.
Includes bibliographical references (p. 124) and index.
</Notes>
<UrlsText></UrlsText>
<AwardsText></AwardsText>
<Prices>
<Price store_id="alibris" is_in_stock="1" is_new="0"
check_time="2005-07-29T01:18:18" price="14.92"/>
<Price store_id="amazon" is_in_stock="1" is_new="1"
check_time="2005-07-29T01:18:20" price="26.60" />
</Prices>
</BookData>
</BookList>
</ISBNdb>
Also, here is specific documentation on attributes in 'books collection' response XML.