Check out this article:
http://www.space.com/spacewatch/090619-how-to-find-satellites.html
Apparently, you can see the International Space Station with your naked eyes. No need for a telescope. Just look up and there it is.
This link has a script that can help find out when you can see the space station. I'm going to try to remember looking for it on the fourth of July around 12:40 in the morning.
http://spaceflight.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/JavaSSOP.html