What is the interest rate you are getting for your money? Check out the website of Emigrant Direct(http://emigrantdirect.com) and if you are getting less interest rate than what emigrant direct is providing, you might consider moving your money to that bank. IngDirect(www.ingdirect.com) was one of the earliest online saving bank and since other players entered the market, it has trailed in interest rate but it still continues to be one of the most popular online saving account due to ease of money transfer and brand names. I have had an account with them for past 5 years and only now when other banks are giving atleast .75% higher interest rate I am moving my money to emigrant direct.
Here is the list of some of the most popular online saving banks in order of popularity.