ING has jumped up to 3.75%. Woohoo!

Email me now to get $25 free when you start off your account with a $250 deposit. I'll send you a referral to use for the $25 bonus. Once you sign up, your referrals to friends and family are worth $10 a piece. High-interst savings, no fees, no service charges, no minimum balance required, FDIC insured, 24-hour access to your account, great web interface.

(Yes, they did change the rules. In the past you could open an account with any amount to get the $25 referral bonus. Hey, free money is free money.)