The App Store, iTunes Store, Mac App Store, and iBooks store were all experiencing problems and unavailable to users from 5 a.m. until around 4 p.m.
According to Apple's system services website, iCloud users were unable to access their accounts from around 5 a.m. until around 9 a.m. Wednesday. The company's website currently lists the iCloud account services and the iCloud mail services as up and running.