But before you send them your money, do some homework. Are the rates permanent or just introductory? Is it a legitimate bank? Check to make sure it’s covered at the Federal Deposit Insurance Corp. at www2.fdic.gov/idasp/main_bankfind.asp. If you’re an ATM devotee, make sure your online bank will refund fees for withdrawals. And you’ll probably want to transfer money between your online and neighborhood banks and your brokerage accounts, so stick to banks that will process the transfer instantly. Are you getting the best possible rates and service? Check bankdeals.blogspot.com to make sure you’ve caught the latest, fattest pitch.