I did a you tube tute on joinging the rows together because although I think the books are excellent and very clear, I can imagine that the row joining could cause problems. Anyway, you seem to have got the hang but otherwise, take a look...
http://www.youtube.com/watch?v=DUnPDdjHZdE
:-D :-D :-D
Re the design layout - I personally think they work best when like hexes are grouped together - doesn;t have to be in blocks, can be diagonally or whatever - it varies with the fabric and the blocks you get but scattered doesn't really give the impact that this technique requires and you can just end up with a busy mess. I'd advise you to really read and take in the tips in the book on sorting your blocks and grouping them together on the wall. Then play around with them, over several days if necessary, and take photos and look at them on screen (that clarifies the layout for me always). Until your happy with it. Your eye should flow around the quilt, perhaps pausing here and there at outstanding blocks but never completely coming to rest in any one spot. Good luck - the design can be challenging but a successful OBW is a thing of beauty! Joanne S's (she posted the link to it above) is a fabulous example as it's a limited colour palette but VERY striking in design terms. :-D Here's the link to her's - sorry, she hadn't posted it but I'm sure she won't mind if I do!
http://www.quiltingboard.com/t-113203-1.htm