What to read on the GigaOM network

Zipcar app finally hits the iPhone (TheAppleBlog)
Are returns from smart grid investments too weak for VCs? (Earth2Tech)
4 open-source apps to make iTunes better (OStatic)
How to make travel time pay (WebWorkerDaily)
Palm Pre woes — when the cloud goes down (jkOnTheRun)
Be an iReporter with CNN’s iPhone app (NewTeeVee)

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