I've had great experience with INGDirect.com (currently 3.4% APY on their Electric Orange savings account)...I did close my account with them recently only because WAMU now offers a 3.75% APY on their online savings account, and since I already bank with WAMU it's just easier for me. There is no balance limit with either of these companies for their online savings accounts, you get these great rates regardless of your account balance. Anyhow, if you don't bank at WAMU I recommend going to INGDirect.com which is open to anyone and can be linked directly to your checking account with any bank so that you can transfer money online. They've bee great to me, even when I called to close my account they were very pleasant. And I firmly believe in spreading the good word when I am treated so well because customer service in general seems to be less and less of a priority to bigger companies these days. The only downside is they do not have bank branches in the US (that I know of, that may have changed). So if you're not used to online banking it might not be the right fit for you.