An upcoming change in the App Store terms of service means that Apple won’t require publishers to offer in-app subscriptions to periodicals at the same or better price than are available elsewhere. As of 30 June 2011, publishers may charge any rate for a subscription in an app, or not offer subscriptions via in-app purchase at all. However, they still cannot provide a link to buy a subscription outside the app. follow link
Single Time Machine Backups
Tired of Time Machine running all the time? You can turn it off in the Time Machine preference pane, but still initiate a single backup by choosing Back Up Now from Time Machine's menu bar icon. Of course, your backup is much less likely to be up to date, but Time Machine won't be taking any resources while you're trying to work.
Apple Changes In-App Subscription Rules