Sony's already showed off its (apparently) proprietary PS Vita memory cards. At the E3 gaming expo, Sony showed them off again. This time was different.
The PS Vita memory cards on display were 4GB, 8GB, 16GB, and 32GB cards. The game cards are also on display.
There was also a card case, and an official PS Vita cloth to wipe fingerprints off. You'll need that. Trust me.