Already have one, and holy crap! $50 for a 16gb memory card >_< Might wait for a price drop.
It's actually $60 msrp.
If you don't mind, you can find memory cards used much cheaper. --- I'm clever, vaguely feminine, a vampire, and I wield Dice. PH33R. The 3DS and PSVita are both outstanding systems. Wally the Equality Weasel says so.