Today in Tech: Research in Motion loses more top execs

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* Research in Motion (RIMM) reported earnings for its fiscal fourth quarter, with a net loss of $125 million and 19% decline in revenue to $4.2 billion. Former co-CEO Jim Balsillie, chief technology officer David Yach, and chief operating officer Jim Rowan, are all leaving the company. Meanwhile new CEO Thorsten Heins said the company is reviewing strategic opportunities and partnerships and would consider a sale "if there was an element detected during the strategic review that would lead us into [the] direction." (Boy Genius Report)

* Google (GOOG) plans to sell Android tablets with an online store of its own in a bid to improve sales. (Boy Genius Report and The Wall Street Journal)

* Facebook has some two dozen engineers working on a deeper, better search engine. Improved search could help the social network capitalize on the $15 billion search advertising market. (Bloomberg Businessweek)

* Apple (AAPL) pledged to work with Foxconn to improve worker conditions and wages. As part of the effort, Foxconn will hire tens of thousands of new workers, improve safety, and upgrade worker housing. (Reuters)

* LivingSocial President and co-founder Eddie Frederick is leaving the daily deals site. (StartupStats)

* SOFTWARE UPDATES: Hulu Plus is now available on 7 Android tablets, with a brand new look to boot. Amazon (AMZN) rolled out a software update for the Kindle Fire, which includes a new reading view option in its Silk browser and the ability for users to share passages and notes from ebooks on Facebook and Twitter. (Hulu Plus and Amazon)

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