Thanks for the super fast response but no dice. I downloaded the Amazon Kindle app so I could easily transfer all my Kindle books to the tab. At least that was the theory. Aldiko requires conversion to epub format - far too much trouble and ultimately pointless - and Wordplay has terrible reviews for, amongst other reasons, not allowing Calibre transfers.
Looks like I'll be transferring everything the hard way.
thanks again for the speedy reply.