How to retrieve the unique id of a post?

I want to use the unique id for a post to creat a special link in the blog.item.php view.

How can I retrieve it?

By now I'm retrieving the user data this way:

$user = JFactory::getUser();

echo 'User name: ' . $user->username . '<br />';

and I guess I should be able to do the same with the "post" object or similar... but I was not good to find clear documentation about EasyBlog object data retrieving.