Someone stole my gym ipod today!!!
I had it on the floor when i was doing leg presses, forgot, left it there, went to buy a water, and some fucker took it.
Who the fuck steals a 1gig old ass nano? 
Sorry for your loss. I have found things in the gym that people left behind after a set and I always take it to the front desk and turn it in to 'lost and found'.
Yesterday, I saw a guy putting his iphone down while he was working out; an accident waiting to happen. Most people at my gym with ipods, etc. having them attached to their clothing or body with a clip, armband, etc. Why wasn't your nano attached to you with an armband or something similar?
btw, did you check the front desk for lost and found? maybe someone turned it in.