Hi Steve
A slightly less high profile writer who has had some success that may be of interest to you is David Moody
http://www.djmoody.co.uk
He publishes his e-books without DRM on a shareware like gig - his first e-book title (i think), Autumn, was popular enough through word of mouth to create demand for a print run (an interesting case of non-DRM ebooks actually creating demand for treeware!)