I had a lot if fun building this and am so glad I did!
Ana mentioned that she distressed the planks by using a screw driver between them to scrape off some of the paint, I did this on the headboard and, while it did work, it was a pain and added a lot of time. For the foot board I painted and distressed all of the pieces prior to assembly and it worked out a lot better! :-)
My 1x8's were slightly smaller than Ana's so I cut down a 1x2 using my circular saw to fit into the spaces left on both sides.
I attempted to use pocket holes to assemble the bed to minimize visible holes, it actually worked great except one side on the foot board :-( I ended up sanding it down and actually ended up really liking it. it always makes me think of it when I see that spot (and not in a bad way)
I cheated when putting this together. I decided to keep the mattress and box spring in their original frame. I used brackets from Woodcraft to connect the side rails to the headboard & foot board.
I stole the finish idea from boxermum here http://ana-white.com/2011/04/king-farmhouse-bed-1 but I did a lot more distressing and my stain turned out a lot darker.