Guided Ways has released an update to its iOS productivity app 2Do noting the addition of support for syncing with iCloud calendars, one of the first apps on the App Store to advertise compatibility with Apple’s as-yet-unreleased new online service. The release notes indicate “OTA CalDAV support for iCloud” noting that the existing in-app purchase for MobileMe support will also work with iCloud when iOS 5.0 is released later this…