I have many ING accounts. While I'm irritated about the fact that their interest rate has stayed between 1.25-1.5% for the last 10 months (October of 08 it was 4.5%; they pride themselves on saying they can offer better rates because they don't have the overhead that banks/credit unions do and that they didn't make the type of loans that other financial institutions did that got them in trouble but even my credit union has been offering 1.25% for the past 15 years on just a plain ol' savings account, I feel like now they're just using the economy as an excuse not to raise their rates back up to at least above 2%, but I digress...), I do like the layout of their website and the ease of use.
I have about 10 ING savings accounts that I have automatic money going into every paycheck (one for taxes, one for car maintenance, one for vacations, one for Christmas, etc.). I also have an ING CD that I got last November for 2 or 3 years (can't remember) at 4.75%.
I also have an Electric Orange checking account that I have a check card with and keep about a $100 so if I'm in a pickle (like I was driving to Atlantic City when I realized I didn't have any money for tolls and had just received a new check card for my regular checking account at my credit union but didn't remember what the new PIN was) I can get money out or use the card for gas or whatever.
I put a small amount every paycheck automatically into my Sharebuilder money market account through ING. When I get over a hundred dollars I invest in stocks or mutual funds for $4.
All of these services are free. I've been with ING for 9 years and I've never had any problems.
**Oh, and one of my favorite things is that you can label the accounts as to what you are saving for. It makes it a lot clearer to see how much money you have for what.