Playstation Vita-memory card confusion

I've received messages in regards with the PS Vita, and it's memory cards.

Let's get a few things straight:

1) The memory card that PS Vita uses is NOT an SD, or pro duo. It is a brand new format that has been developed by Sony.

2) The PS Vita is not compatible with SD, or pro duo cards! I'm making this clear! (Some of you went out and purchased many incompatible cards.)

3) There are four different types of cards as of now. They are 4gb, 8gb, 16gb, and 32gb.

4) Price: 4gb=19.99 8gb=29.99 16gb=29.99 32gb=59.99 (CAD/USD apply)