yes! make an anncoment and say- i have an iPod nano, if you can tell me what color it is, and a few of the songs on it, then its probably theres. After doing this for maybe 2 weeks or so, then you can keep it
Ya, have some self respect and do what you know is right. You will never feel good about having that nano and will prolly end up losing it or giving it away. It's not good in many ways to have something bad on you.
If they report it stolen and give the serial number, what do you think will happen if the police stop you and take down the serial number? If they run the numbers and it comes up as reported stolen, YOU saying "I didn't steal it, I found it" isn't going to get you very far. You will deserve what you get. BTW, if they have homeowners or renters insurance, they will file a claim, need a police report, and must give serial number.
If you know who it belongs to then return it to them, but if you don't know whose it is, then just give it to the bus driver so that when everyone's on the bus, he can ask if anyone has lost an Ipod nano.