I would like to have a "Facebook style link commment" feature in Drupal 7. When you enter a URL it will pull the page title, first 100 characters of the main website text and an image. There is a module called "Facebook Style Micropublisher" but it's Drupal 6 only. Any other ideas on how this could get accomplished?
The manual way to do it is to create a custom module that uses drupal_http_request to download the remote URL, then parse through the resulting data to pull out any images, a summary, and the contents of the title tag.
A better approach might be just porting the Drupal 6 module yourself - it's probably less work and you could contribute your code back and possibly get patches from other contributors.