Not the hottest deal but nice if you only have a savings account with ING. A signature based transaction is any transaction that does not require the PIN.
"Open your account by May 31, 2009 and use your Debit MasterCard® to make 3 signature-based transactions within the first 45 days. On day 50, we'll put $50 in your account. Visit www.ingdirect.com/electric50 to learn more. Don't forget to enter Reference Code EM258 to be eligible for the $50." you'll need to use the link to use EM258. You may need to have an existing account.