Most of the book/plate stands won't work for iPad when the USB connector is plugged in. The plastic/aluminum stands are flimsy for the heavy iPad. I got bored of iPad lying flat so designed & build a stand/holder for iPad myself using Maple hardwood & slip resistant pad. Here's the link for details. It is very sturdy & doesn't move on multiple touches to iPad.
he he you touch the point we see long time ago it's why all our stand have the place for the cable so you can let you're iPad in charge in our stand we have especially develop a cable with the connector in L for some special position