I may have overlooked something, (since I don't use WordPress), but:
- what if WordPress was the OpenURL resolver, (well, actually it wasn't but just looked like it)?
- what if txtckr could redirect to the WordPress post which had the request response once it had made a post which contained all of that info?
There's also the tools available through something like the WordPress platform, which further promotes the re-distribution of information about articles, books, etc., including COinS, RSS feeds, OAI-PMH, unAPI, etc.
Of course there's also the ability for others to comment and refer, (trackback), on the item being represented in the blog post.