This would be a great poker deposit option, except that it is accepted at very few online poker rooms. PokerStars is the most notable poker room that does accept eChecks. Not only that, but they accept them from American players too.

An eCheck is very simple to use. It is the same thing as writing a check; except you are doing it online as an electronic check. This is probably the most convenient and easy way to make a deposit if the method is available to you.