I am pleased as punch to have found a way to link up my Dropbox account with iWork for iPad. And it’s easy. And it’s free.
Once you’ve signed up and linked Otixo to your Dropbox account (you can do it with Google Docs too – double result!), simply go on to your iPad, go to your WebDav options and enter:
…as the address for the WebDav server. Then enter your username (email) and password for Otixo.