Unless you use Google Toolbar or FeedBurner, Goo.gl won't be of much use to you for now.
In a blog post, Google Software Engineers Muthu Muthusrinivasan, Ben D'Angelo and Devin Mullins explained that:
If the service proves useful, we may eventually make it available for a wider audience in the future.Thus bit.ly, tinyurl and even icanhaz.com are doomed. [Google Blog]
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