maybe someone should develop a paypal2btc escrow service , paypal is to mainstream to leave behind
I don't think you understand the problem. An escrow does nothing unless the escrow is held past the point of risk. Traditional escrow funds are held until seller delivers. Since BTC is irreversible once seller delivers goods the escrow can be safely released. The point of no risk for PayPal transaction is 180 days.
So sure I just started the first BTC PayPal escrow. Pay me today and I will deliver your coins in 180 days. How many coins would you like to buy?
Exactly - when I trade, I just wait for the funds to be in hand as $ before i send coins. Sometimes it takes a few days but this is the only way to protect from chargeback. Would be nice if paypal had a sender 'I confirm transaction and waive chargebacks' button.