$50 E*Trade offer should in the TurboTax package. But here's better offer $50 on $500 deposit to open a new account. Go to www.etrade.com/offer and type in GAC to get $50.
BTW I got a mail from E*Trade saying that I could get upto 10K UA MP miles if I open an account by April 30. The code for this offer is DWS.