Facebook's debut is modest, high volumes cause problems  —  (Reuters) - Facebook Inc shares rose less than expected on their first day of trade on Friday and huge order volume caused technical problems that marred the coming out party of the No. 1 online social network.

How Facebook Hacked The NASDAQ Button  —  Editor's note: Some savvy Facebook engineers rigged the NASDAQ button to automatically post “Mark Zuckerberg has listed a company on NASDAQ - FB” to the CEO's Timeline as he rung the bell to open the NASDAQ's day of trading.

Facebook Sued For $15 Billion In Suit Over User Tracking  —  Facebook Inc. (FB), which is scheduled to begin trading today, was sued by users of its social network in an amended class-action case claiming the company invaded their privacy by tracking Internet usage and seeking $15 billion.

Samsung gets 9 million preorders for new Galaxy phone: report  —  (Reuters) - Samsung Electronics Co has received some 9 million pre-orders for its third-generation Galaxy S smartphone from more than 100 global carriers, the Korea Economic Daily reported on Friday.

Worries mount as Nokia burns through cash  —  Nokia Oyj is tearing through its cash reserves at an unsustainable rate, raising what some analysts say are serious questions about the struggling Finnish phone maker's ability to stabilize its finances in the months ahead.

RIM, Motorola told Apple they could find a nano-SIM compromise: here it is  —  Eventually, the committee chairman decided to hold an informal vote by show of hands whether each of the two proposals adequately met the jamming requirement.  For the Apple design, seven voting members said it did not, 28 said it did.

Foursquare Hires Former iAd Exec as Revenue Chief  —  Steven Rosenblatt Is Longtime Mobile Exec From Quattro Wireless  —  A month after Ad Age learned that Foursquare will soon launch advertising products, the company has hired its first-ever monetization lead.

Zuckerberg Receives Hoodie, Says “Our Mission Isn't To Be A Public Company” In Pre-IPO Remarks  —  Facebook's CEO Mark Zuckerberg received a commemorative hoodie from the NASDAQ CEO Bob Greifeld and thanked his site's users in opening remarks recorded before he rang the NASDAQ opening bell this morning.

Reticent Rich: Preferred Style in Silicon Valley  —  MENLO PARK, Calif. — Wealth is here if you know where to find it.  —  Fabulous home theaters are tucked into the basements of plain suburban houses.  Bespoke jeans that start at $1,200 can be detected only by a tiny red logo on the button.

Groupon Stock Spike Probed  —  Wall Street Regulator Is Reviewing Jump Monday Before Firm's Earnings Release  —  A Wall Street regulator is examining trading in Groupon Inc. that sent its stock price soaring hours before a favorable earnings announcement Monday, according to a person familiar with the matter.

Facebook buys Karma app  —  The newly public Facebook says it is buying Karma, a mobile social gifting app.  The news was released via Karma's blog.  The deal terms were not announced.  Facebook plans to keep the service alive.  A Facebook spokesperson said this is an acqusiton and not an acquhire.

Microsoft's ‘buy a PC, get a free Xbox 360’ deal returns for students on May 20th  —  Microsoft is announcing the return of its buy a PC and get a free Xbox 360 deal for students this week.  Students in the US who purchase a qualifying PC worth $699 or more at certain retailers will get a 4GB Xbox 360 for free from May 20th onwards.

Facebook Keeps Shipping.  Now You Can Silence Spammy Apps And More With New Notification Controls  —  If there's something on Facebook that won't stop pinging you with Notifications, tell it to shut up instantly with Facebook's new granular, in-line notification controls.

Exclusive: Yahoo Finally Set to Strike Alibaba Share Deal — Half Now, Then Half of What's Left After Eventual IPO  —  Yahoo is in the final stages of selling a large chunk of its stake in the Alibaba Group back to the company — in a complex deal that is set to include a multi-billion-dollar share buyback …