I find the work of Victoria Finlay Wolfe inspirational. She does a lot of improvisational piecing and creates "made fabric" which she uses in her quilts. If you visit her blog here this week, she has a link to watch her recent episode on "The Quilt Show" for free. You do have to sign up for a free account.
I love her quilts and hope you check out the show and her blog.
On her site "15 Minutes of Play" Victoria and others share tutorials worth checking out.