Here is a work-around to transfer your iWork documents to GoodReader, Dropbox or another app on your iPad if you are not in a wifi environment and do not want to use external devices (which often happens to me).

(1) choose to e-mail the Pages, Numbers or Keynote document to yourself (or to whatever non-existing e-mail address);
(2) the e-mail app will now try to e-mail the document, which is of course not possible due to the absence of wifi;
(3) however, the e-mail will remain in your Outbox, so go to your e-mail and from there you can tap on it and open it in 3rd-party apps, such as GoodReader and Dropbox. You can also open it in PrintCentral and print it on your wifi printer (otherwise iWork only prints to AirPrint-enabled printers). Then you can delete the e-mail from your Outbox so it will never be sent.

I am very disappointed that last week's iWork update still does not connect to 3rd-party apps, such as GoodReader, PrintCentral, Dropbox, etc, but for now this will do.