What to read on the GigaOM network

Amazon, Wal-Mart follow Apple’s lead with variable pricing (TheAppleBlog)
Why rumors of an e-book reader from Barnes & Noble make sense
12seconds’ UGC commercials are for Twitter attention spans (NewTeeVee)
Green data centers’ lowest-hanging fruit? Air (Earth2Tech)
How to stop procrastinating — now (WebWorkerDaily)

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