How to display node/add/sometype form on another page?

Question

The whole problem is following:

Lets say we have Items, Items can have Bids, Items can have Questions and Question can have Answer.

When an Item is displayed

Answer 1

To get dobeerman's example (the accepted answer) to work in d7, add 'language' => LANGUAGE_NONE and cast the $node array into an object. i.e.:

$node = (object)array(
  'uid' => $user->uid,
  'name' => (isset($user->name) ? $user->name : ''),
  'type' => $node_type,
  'language' => LANGUAGE_NONE
);