One of my friends has his laptop over, he has a wireless network card for his house, then he has a regular ethernet which is what i use in the house.
Anyway, we booted it up, and noticed that the wireless lan picked up a signal, it was really low signal but it connected, was like 1.5 mbps I think.
Some poor guy/gal in the neighborhood didn't set it up right and I was able to get a connect of them.
and of course, he didn't have his router configured so you could just type in the default, admin password and get in.