Wirelessly posted (Apple Communication Device: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_0_2 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5C1 Safari/525.20)
I think the server that was being overloaded is the music streaming server that Simplify uses to stream music from user's computers to their iPhones. That is something Simplify has to pay to maintain and upgrade.