Do you all want my 2 cents worth?
It doesn't matter, because I'm going to tell you anyway.
The Universe is infinate. There is no brick wall at the end which reads "You have now reached the end of the Universe". And even if there was, what is on the other side of the wall? Or does the thickness of the wall continue on forever?
Some people have tried to say the Universe is actually a sphere and if you travel far enough, you will end up right back where you started. Okay. What is on the outside of the sphere? More Universe.
Since the Universe is infinate, the planets and stars are also infinate. Where space exists, the possibility of something occupying that space also exists.
Therefore, there are infinate possibilities for life (of any form) to exist, as well as infinate possibilities for intelligent life.