Registered developers have been testing the iWork for iCloud beta since Apple announced it at WWDC, but it appears Apple is now opening testing up to the general public. Many iCloud users who aren’t registered with the company’s developer program have received invitations to get involved.
Not all iCloud users have been invited yet, and it’s unclear how Apple is handling the rollout. But we presume it’ll gradually open it up to everyone as the weeks go on — before the service launches properly this fall. If you haven’t yet received an invite, then, don’t worry; you should get one soon.
Once you have it, you can log into iCloud.com and you’ll find the Pages, Numbers, and Keynotes web apps there for testing. Of course, they’re available on both Mac and PC, opening the iWork productivity suite up to Windows users for the first time.