Search for "Malex" on iTunes, and you'll see my two latest albums. My favorite way of getting the stuff up there is to work with CD Baby. They do charge you a setup fee, but they keep tabs on
all of the various online music stores around, and they push your music to all of them.
So the sweet thing is that I only paid ~$35, and you can find my music in nearly every online music store in the world.
As for payment, I only get 91% of whatever iTunes sends CD Baby, but it's worth that to me for hassle-free online music distribution.

Hope that helps. God Bless!
--Alex