The following article outlines the configuration of WebDAV in Apple's Pages which will allow you to open a NetDocuments document from within Apple's Pages on the iPad.
Configuring WebDAV in Pages
Open Pages on the iPad. Click the Import a document icon in the Upper left corner and choose "Copy from WebDAV".
Enter the required information on the WebDAV Sign In page and then click sign in at the top right.
- US Data Center server address: https://vault.netvoyage.com/webfolders
- EU Data Center server address: https://eu.netdocuments.com/webfolders
- Enter your NetDocuments username and password.
Save the document back to NetDocuments via the Open In option in Pages.
See Using the NetDocuments iPad app for more information on saving via Open In.