Apple released a beta version of its iCloud services to developers. Above, Apple chief Steve Jobs takes the stage to discuss the iCloud service at the Apple Worldwide Developers Conference in June. (Beck Diefenbaach/Reuters)

As Apple CEO Steve Jobs announced at the Worldwide Developer’s Conference in June, iCloud subscribers will be given 5GB for free when the service launches. But according to pricing tiers posted on the developer beta, users will also be able to upgrade to add 10 GB for $20 per year, 20 GB for $40 per year or 50 GB for $100 per year.

Expanding your Web storage might sound tempting, but users should remember that purchased music, apps, iBooks and photos don’t count toward your free quota.

The beta service — which was briefly available to all users with Apple IDs but has since been reined in — features Web apps for Mail, Calendar and Contacts and has an iOS-style navigation menu. The look of the iCloud apps is in line with the redesigns of these core programs for Apple’s latest operating system, Lion. The calendar and address book programs have the same look of hardbound desk accessories while the e-mail Web app emulates the iPad and Lion Mail programs.

Posted screenshots also show that there is some integration with Pages, Numbers and Keynote on the Web service, with storage and syncing capabilities.

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