Boards have been built and worked the first time.  Woohoo!  Only thing I've noticed so far is that I neglected to tent the vias (cover them in soldermask) under the super small BGA SRAM.  This has a nasty effect of making it very hard to hand solder these (yes, I hand soldered the BGAs :).  The vias create their own surface tension and can pull the BGA off of it's lands.  Still, managed with patience & a cheap reused stencil I scored from Ian at Dangerous Prototypes at Makerfaire (he was going to leave it behind on his way back to Shenzhen...I recycled it...thanks Ian!), to get the boards to work.  

Anyone interested in testing one, having a whirl with one, what-not, let me know.  I will put up some videos that show me using it and talk u thru the nuts and bolts of the Xilinx development software.  :)