Auto-generate a thumbnail for pasted links

[Torniojaws]

Something like this might make pasted links nicer:

1. User pastes an URL into a field
2. The URL is parsed into a link with an image - possibly from a predefined collection?
3. The final version is then written to the DB when posted/updated

Generated output would be something like:

<a href="url">
  Possibly the URL title
  <img src="path/to/selection.jpg" alt="url-ending?" />
</a>