When I try to buy them on B&N, i go to click "buy now" and nothing happens??
You should be able to download it from barnes & noble. Then you can connect the device via cable (it should come with one...) and drag / drop the file to your device.
At least that's how it works for kindle.
I just noticed on their website, you need to setup the time on your ereader else you won't be able to download anything...(pandigital.net) :)