Free Ring tones for the iPhone

One of the means that Apple could use to generate more money from the iPhone is the sale of ring tones via the iTunes store. This system never attracted us, primarily because of the prohibitory tariff of the pieces that are sold twice.
The myxer.com site throws a spanner into the works and proposes to download free ring tones ready to install, in the format .m4r.
To obtain them, it is enough to choose the piece, to click on "Download to iPhone" then to take the downloaded piece and place it in the section 'ring tones' of iTunes. Once synchronized, it will be usable.
We imagine that Apple, in one way or another, will try to stop with this all too generous offer.