For about an hour and 20 minutes earlier today, some 20 percent of users trying to access the iTunes Store and associated services such as the App Store and iBookstore were blocked from doing so due to a service outage, Apple reports. According to its Services Status page, the problem began at 7:25PT and lasted until 8:45PT this evening. Earlier in the day, a small (1.5) percentage of users were hit with a brief iCloud outage that lasted about 45 minutes in the late afternoon, Pacific Time.