Anyway, I went searching for an official design wall. Fons & Porter sells one that has lines printed on it, which could be useful, but I probably wouldn't actually use them that much. However, on Amazon.ca its $30 (I think it was even more when I originally searched it); and in Fabricland it was something outrageous like $60. (Don't get me started on how overpriced notions are at Fabricland, its absurd). I could have purchased a large piece of flannel, but probably would have had to piece together smaller pieces to make it big enough and it could have been quite expensive still.
Well, I came up with a better idea! I ended up deciding to buy a flannel-backed tablecloth! I got one from Amazon - 52" by 90" - so its huge! And it was only $11. It came all folded up so it has some crease marks in it, but those will eventually drop out, I'm sure. And it works like a charm! I just used some pins to attach it to the wall and have been planning my projects and "storing" blocks that are in the works. I love it! Highly recommend.
Here's another picture of it folded in half - makes it look a little cleaner, but I do like having the space of the full wall.
And a sneak peek of my Christmas quilt that I"m slowly working on!