I got my bottle of Biokleen up at the Central Co-op's Madison Market a few months ago (you only use an ounce at a time, so it lasts a looooong time). It's not really scented, but it has some citrus cleaning components so it has a pleasant vaugely citrusy smell to it. I don't think it really leaves any scent on the clothing.
I also have a front loader and I can tell you it is much, much gentler on clothing. Even rough and tumble stuff like jeans last a whole lot longer using this machine.
I could get Dr. Bonners up at Trader Joes, but I wonder if it would be too sudsy to put in my washing machine?