Stock wheels? I had a bike once that would pop the spokes when not being ridden, just parked, from the heat, I guess. I'd leave it in the shed in the morning, come back after work to find a spoke broken. I broke a spoke during the first week of riding too, then a few more. I don't buy stock bikes and wheels any more and I haven't had any problems with spokes ever since. Well, except for a wheelset I built myself I suck at this, so I won't try again.

Depending on how much it'll cost to rebuild those wheel you might just buy a new wheelset from Bicycle Wheel Warehouse or Universal Cycles. I have an under $150 BWW wheelset on my commuter that gets a lot of abuse and is usually loaded with crap and after a year and a half the wheels haven't even gone out of true a tiny bit. And I hit potholes sometimes so hard my butt hurts.