If you're still wavering about slapping in your credit card details for an iPad preorder, perhaps some new tidbits about functionality might change your mind. Apple have quietly added a few new details to their iBooks and 3G pages, including confirmation that readers will be able to load non-DRM ePUB format titles to their iPad via iTunes.
That accompanies support for Apple's own, DRM-encrypted ebooks and digital content that will be purchased on-device through the iBookstore. Previously, while we'd known which format Apple would be using, it was unclear whether titles from outside of the iBooks ecosystem would be supported. Still, it looks like there'll be no way to download such content directly onto the iPad itself.
Meanwhile Apple have thrown up some screenshots of the 3G management system by which owners of the iPad WiFi + 3G models will be able to control their mobile data usage. As well as being able to sign up and cancel on-device, there'll also be a running total - useful for those on the 250MB package ($14.99 per month) - and the ability to switch between that and the unlimited data package ($29.99) or add a one-off 250MB boost ($14.99). It's also been made clear that you can sign up and cancel as often as you like.