Last week, Apple CEO Tim Cook pranked the entire iPhone-toting world with a gratis copy of U2's new album—"Songs Of Innocence"—beamed directly to everyone's phone, without asking. Today, it's letting you undo this dark magic.

Twitter co-creator whose real name is actually Biz Stone has a new project called "Jelly." No one knows what it is, other than an epicenter of vagaries and tech intrigue. Now it's got big, rich new investors. Whatever it is.