Hi Mike,
First of all, i've been keeping track of this at uni since the first announcement and am very happy to see how far along it has come. Very excited about where it's going also.
I was using Flashcards this morning and found that when I first added a category and assigned words to it, all was fine. However, when I added a second category, the original one disappeared along with the words belonging to it. In addition, the new category I set up didn't appear either. When I add categories now nothing appears.
Device: HTC Desire running Android 2.2
If this relates to the fact its still early days in development, no problem, wanted to ensure it was visibile if not.