I've been collecting homespun plaids too. I have a book on quilting with plaids, but I can't find it right now. I've got a couple of other quilts I have to do first.
I have made one quilt and used a plaid. It wasn't homespun. But I cut the fabric with the grain and not the lines on the plaid. I may have to take them out of the quilt because the lines not being straight really bother me.