Finally, Smell-o-vision! When can I get it from Netflix?

As Business 2.0 reports in a story called "How To Sell With Smell" in its April 2007 issue, Walmart will be rolling out "Smell-o-vision", experimental DVDs with scent wavers that release odors at precisely timed moments during a movie. Can't wait to smell a Western shoot-out or the nice smells of the Venice lagoon when I watch the next time.

The only problem is: I don't buy DVDs, I rent them from Netflix. So how will they be sending me the wavers? In additional red envelopes? Do I have to send them back together with the movie, otherwise the movie doesn't register as a returned movie? Or can I keep them until they are used up? Do I have to go to a Walmart store, since they probably have exclusives? And if I get them there, will these work with Netflix rentals or do I have rent my movies from Walmart as well?

Questions over questions -- I cannot wait for answers!