LEADING THE DAY: Amazon launched a cloud music player, Cloud Drive, which allows users to upload their music libraries and listen through their Web browsers or Android phones. The company has beaten Apple and Google, both of whom are said to be close to launching a cloud music services. Both companies have been held up by negotiations with music companies.

CNET reported earlier that Amazon had not yet obtained all the necessary licenses for the service but would likely announce the service before negotiations finished.

Nokia files another patent claim: Nokia has filed another patent suit against Apple, alleging the Cupertino, Calif.-based company is violating patents for “virtually all” of its phones, music players, tablets and computers. Last week, the U.S. International Trade Commission ruled that Apple had not violated Nokia’s patents in an earlier complaint.

The new complaint, the latest of several Nokia has filed against Apple, is over seven patents related to multitasking, data synchronization, positioning, call quality and the use of Bluetooth accessories, the AP reported.

Sina dumps Google: The Wall Street Journal reported that Sina, a key partner for Google in China, has decided to replace its Google search engine portal. The portal operator will now use its own search after its contract with Google expired. The company has had a declining presence in China since it objected to censored search. Since then, Google has had several public disagreements with China, most recently over slowness in its Gmail service in China.

Google, Twitter make notable hires: Google has hired James Gosling, the founder of Java for Sun Microsystems. In his blog post announcing the hire, Gosling said he did not know what he will do at Google, but expects he will do “a bit of everything.”

Twitter rehired co-founder and former CEO Jack Dorsey yesterday. Dorsey will be the company’s executive chairman, and will be leading product development. Rumors of Dorsey’s return as a Twitter executive were reported by several sources last week.

Cyber security hearing delayed: The Senate Commerce Committee has delayed a planned hearing on cyber security, as Sen. Jay Rockefeller (D-W.Va.) attends the funeral of a close friend, Judge M. Blane Michael. According to the Hill, the hearing is delayed until May.