I use Createspace for my hard copy self-published books; their quality is excellent, their per-copy production costs can't be beat, and now they offer expanded and international distribution options, too.
April L. Hamilton is an author, blogger, Technorati BlogCritic, leading advocate and speaker for the indie author movement, and founder and Editor in Chief of Publetariat.com, the premier online news hub and community for indie authors and small imprints. April is also on the Board of Directors for the Association of Independent Authors.