How to import title, description and image from website
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.

This is a lot harder than it sounds because manually parsing HTML is actually pretty tricky. If you must take this approach, try using simplexml or a library that tries to simplify things for you.

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.