Rockbox has a disclaimer, as one might expect. But no one has posted of a bricking of a Clip for many months, and even before then, any issue of that type only was rare.
The Clip (and other Sansa player) Rockbox port page: http://www.rockbox.org/wiki/SansaAMS
The Rockbox manual page (don’t be intimidated by it–it tries to cover all of the many Rockbox options; it also includes install instructions): http://www.rockbox.org/manual.shtml
