Packet loss statistics

[kilroy at WasHere.COM (Ric Messier)]

Is anyone aware of useful resources for packet loss over large LANs and 
WANs? Google turned up a nice statistics page for Qwest's network but not 
much else that seems useful to me.

Our testing teams are trying to simulate expected network conditions and 
rather than go overboard, having something close to real-world parameters 
would be nice.

Thanks!
Ric