Of course there is!
I have no proof to support this but really, the universe has billions over billions over billions of stars. Many of them with planets.
It is highly unlikely we're the only inteligent life on the universe just like it's unlike we will ever meet them.
More simple life, such as unicelular kinds of life, I believe those are more likely for us to find. Saturn and Jupiter moons have a good potencial due to existance of water below their surfaces and heat provided by their inner volcanos.
I would like everyone to see this image whitch is the deepest spot on the universe that the telescope Hubble could capture.
[a href='http://upload.wikimedia.org/wikipedia/commons/0/0d/Hubble_ultra_deep_field_high_rez_edit1.jpg']Hubble Ultra Deep Field [/a] (18.6 MB btw)
Now, after seeing that, knowing that every non dark pixel on that picture is a galaxy with billions of stars, can you really remain thinking we're all alone?