Mainet will go live Q4 2014
So will the Ether bought by investors at IPO be frozen until Q4 2014?
Won't investors be able to trade ether until then?
Will the ethereum economy be frozen until the Mainet goes live?
Correct, what people would be buying is actual Ether, not testnet Ether, therefore what is purchased would be listed on exchanges/tradeable only at the start of the mainnet in Q4.
Cheers!