I ordered both the moku case ($5) and the poetic slimline case ($10 + shipping). Moku was cheaper and had a shorter shipping time so that is why I ordered the cheaper moku one first. It is a good case.
I just received the poetic one and comparing them, both these cases seem completely IDENTICAL to me.
I bought the HotCool case. For preorder it was 4.99 for black but the price keeps going up each week. But I love it, cutouts are perfect, the inside lining is soft, the wake/sleep function works great and the different ways to stand the tablet is nice. I'll be sticking to this case for a while.