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]