NEW YORK (

TheStreet

) --

Yahoo!

(YHOO)

confirmed Tuesday that it will lay off 600 employees, or 4% of its workforce beginning this week. The cuts will come from the company's product group.

Amazon

(AMZN) - Get Report

and

Research In Motion

(RIMM)

announced that they have teamed up to launch AmazonMP3, a new mobile music application for BlackBerry devices. The service allows users to download more than 14 million songs from Amazon's library and listen to 30 second clips before purchasing.

Shares of Amazon fell 0.1% in pre-market trading Wednesday to $173.77, while shares of Research In Motion dipped 0.46% in pre-market trading to $60.17.

Time Warner Cable

(TWC)

CFO Robert D. Marcus will be the company's new president and chief operating officer, the company announced Tuesday. Marcus is believed by some to be the replacement for CEO Glenn Britt when he retires.

Facebook

topped the list of best places to work, according to career site

Glassdoor.com

.

Southwest Airlines

(LUV) - Get Report

placed second on the list, followed by management consulting firm

Bain & Company

.

In other Facebook-related news, founder Mark Zuckerberg was named

Time

Magazine's Person of the Year.

The CEO of New York-based daily deals site

BuyWithMe

has left the company after only eight months on the job. The company is likely to raise more money as competitors like

Groupon

and

LivingSocial

pull ahead, interim president David Wolfe told

AllThingsDigital

.

--Written by Olivia Oran in New York.

>To follow the writer on Twitter, go to

http://twitter.com/Ozoran

.

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.