I just did a pretty large afghan with Homespun yarn that was a pattern out of Boyd's "I taught myself to knit" book. I used size 13 needles as suggested (larger needles the better with this yarn and loose tension) and the pattern is a nice Old Shale ripple (no yarnovers though). It turned out wonderfuly soft and elegant. You can definately see the ripple pattern and it's a lot more classy than it would have been just knit and purled, in my opinion.
I HATED working with the yarn. It was SUCH a pain! But I have to say that I'm glad I kept with it and finished. I've never felt anything so soft and cozy.
Here are a couple pictures of the finished blanket. It's about 60" long and 50" wide. The pictures are horrible quality because I don't have a digital camera and had to use my cell phone. If you're interested in this pattern pm me.
Hope this helps!