I decided to printout the document before I depart... Upon arrival, I have the recipient sign the doc and then I scan and email via Qipit...
This seems to be the easiest method I found so far, at least until someone develops and app that will allow us to embed the signature image into office documents...
I think one of the main challenges that we face with this is that Mobile Office apps are limited to what we can do... Inserting images seems to be one of the limitations...
Hopefully one day a solution will be available to us and hopefully it will be FREE!!!