Hi xaueious, very logical - thank you.
1) The Case/Keyboard will not plug into my computer, because it has a MINI-PLUG termination and my computer only accepts full-width USB cables.
2) What other peripherals could I try with the Wopad? I did use the USB cable that came with it - which has a full-width plug on one side and mini-plug on the other - to transfer files to the Wopad from the computer, and this works.
EDIT - I have now tried the next thing I was going to try, which fits with the above. I tried a "flexible keyboard" that came as a freebie with my order. This has a USB cable that terminates in a full-width plug. This works! Furthermore, once this is plugged in (in "Host Mode") the option to deselect the on-screen keyboard does appear! Yay!
So, at this time the problem may be that my Case/Keyboard came with the wrong USB cable plug type. I am waiting for "online chat support" at this moment - I will provide them with this additional information.
Thanks for your help folks!
For the Wopad, do any other peripherals work with it? You want to isolate the issue. The keyboard should just a standard USB keyboard. Try plugging the keyboard into your computer and see if it works properly first.