Despite all the problems with the Kindle -- poor PDF support, low-contrast screen, Orwellian fears -- it makes for a mighty-fine reading experience for users. From a publisher's perspective it stinks, with Amazon reportedly sucking down 70% of a sale's proceeds. Hearst Corp. (owner of the Houston Chronicle, Oprah Magazine, and many others) wants to set things right. For two years the company has been developing a digital content publishing a