CNET UK: "Google Editions will launch this summer, and looks set to start a new chapter in the ebook market. The browser-based ebook store will offer ebooks that work on any device, which could spell trouble for the proprietary systems offered by Apple, Amazon and Sony. Ebooks bought from Editions will work on devices from phones to a netbooks to any one of the range of ebook readers already on the market. Other ebook stores are often tied to the store's own device, as with the market-leading Amazon Kindle, and Apple's forthcoming iBook store for the iPad. Google is planning for Editions to launch by July, although it's likely that will be a US launch date."
Blog Kindle has as many details as are currently available about the program - a very good rundown.
