Apple has made the iWork for iCloud in-browser versions of Pages, Keynote and Numbers available to registered developers as a beta release. The browser based version of iWork was announced at Monday's WWDC Keynote address.
iWork for iCloud is expected to be released to the public later this year. For now, registered developers can log in with their developer credentials at beta.icloud.com.
Article Link: Apple Makes 'iWork for iCloud' Beta Available to Registered Developers