If you're wondering what happened to it:
Hope they get it figured out, heck of a concept.
Here is a link that might be useful: Raven Mower Recall
I read somewhere that they've made a lot of improvements to the Raven after it was recalled, and it is now available at Lowes again. However, I also understand it is only available in the South for now (since they are mfr'd in North Caroline, IIRC), but Lowes may offer them nationwide next year.