preliminary WS2812B 8x8 Matrix Booster Pack

I layed out the initial planning for an 8x8 matrix using the WS2812B LED's Rob posted about recently.  There is a 2.1x5.5 barrel jack to provide power cause 64 LED's will draw a lot more than a USB cable can provide (almost 4 amps at 60ma each).  so I provided a 3.3v regulator to power the launchpad's VCC line.  there is a single decoupling cap shared between every other LED since the power pins are next to each other(pretty close), should still be enough. half of the LEDs are spun 180 degrees to make routing the data lines nicer.

I haven't worked with these before so I don't know if a string 64 long will be an issue for the LP...i don't know the timing.

right now it just takes P1.0 to the data in of the first LED, and daisy chains the rest.

thoughts, ideas?

Rob said he can get these LEDs for $0.13 each at >100 so its only 8 bucks worth of LEDs... although soldering will be umm difficult without a one pass reflow setup.

the tops of the header legs will need to be clipped so they're flush  but I dislike SMD headers.