What kind of information do you need from the
$node object that you can't get from views standard options?
If you enable views_customfield you can add a PHP code field into the Views UI. Just add the node NID as a normal field and then add a custom PHP field, then use:
print var_export($data, TRUE);
in this new PHP code field to show you what items you can call from the views result.
One of them will be the nid so you could use
Remember you need to add the PHP opening and closing tags around your code in the Views customfield.
You could do the same in a template or preprocess function too and if you have some complex logic that is what I would recommend.