How do I add a node add link ( for a different content type ) in the node add form (drupal 7) I'm overriding the node add / edit form using panels. One of the fields that I have added is using the auto complete widget (it is a node reference field). I also want to add a link underneath the autocomplete field to add a new node (one of the referenced nodes). I'm wondering if there is a way to add this link.

If it's not possible within panels, perhaps it is possible someone can give me an idea of how to add this sort of link to node add form using templates.
The module your are looking for is References dialog.

Also, you can use contextual administration. It's a more general approach, that won't put the link exactly where you want, but is much more flexible on the other hand. It allows you to use the same rule set as Panels, such as "Selection rule: Node type", for example to node/add/[other-type]. Fits like a glove together with Panels.