What beeps, blips or boops should be used when for the third place?
I am talking about the sound played when a message is received on chat.meta.stackoverflow.com and pals.
Edit by balpha: We'd really like to get more suggestions on this. So go ahead and find nice sounds! Please be sure to include any neccessary information (e.g. license). When each Stack Exchange site has its own chat, they should of course also have their own distinguishable sounds.