I want to open a fx trading account, where I can trade at least
USD/Euros/GBP. I'm looking for an account with no ongoing fees, good
web-based access for trading, the ability to transfer funds directly
into/outof my USA bank account online. I want to know what my options
are, and to see a comparison of the interest rates I will receive on
USD and Euro balances today.

When trading currency you should first look at the financial condition
of the company.  I would recommend fxcm.  The major problem with them
is that you must fax them paperwork to get your money.  The plus side
is that they have people working 24 hours a day, and they can place
your orders for you, while you are at work or wherever. I have a
currency calculator and pip stop designed if you need it. It gives you
the amount you wish to lose that day, if that will help.  With oanda,
the fills are not as quick, but you have the charts up constantly. 
They also have much more currency pairs to work with.

You may want to consider Interactive Brokers
(http://www.interactivebrokers.com). They allow one free transfer out
per month with a $1.00 fee on any additional ACH transfers. The
leverage is 50:1 on USD/GBP/EUR. You also have access to a number of
other products from the same account.