Oyster beta for iPhone offers all-you-can-read e-books for $10 per month

All-you-can-eat subscriptions work well for digital magazines, music and videos; why shouldn't they work for e-books? Oyster certainly thinks they should, as it just launched a flat-rate book service in beta for iPhone users. Members pay $10 per month for unfettered access to about 100,000 books from HarperCollins, Hougton Mifflin Harcourt and smaller publishers. The unlimited-use model also facilitates a Goodreads-like social component that shows what friends are reading at any given moment. Bo...