If you have debug turned on, you will see an alert message on the screen if an Eye-Fi card is trying to talk to the iPad, but never sends any files.
So if you're inside a collection, snap a picture with your camera, and nothing happens (no images, no dialogs) then the card doesn't know about the iPad ...yet. It's possible that it's just a little time about discovering it. Give it some time. If nothing happens, something else is going on. You're welcome to send me a private message and attach your Eye-Fi card log, then maybe we can see why it doesn't send.
You get the log by inserting your card into your computer, open the Eye-Fi Helper menu and choose "Get Eye-Fi card log"
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