My b2evolution Version: Not Entered

I like the auto updating twitter, but I was wondering if there is a way to automatically shorten the URL? I am indifferent to the URL shortener used, but can't seem to find any info on this.

For example instead of tweeting:

Blah Just posted: This is My Title http://foo.blog.com/post

I'd like to have something like this

Blah just posted: This is My Title http://goo.gl/4Y5T2

I have tried searching the forums/google but my search fu is weak! Thanks in advance for any help.