What happened to Sierra Stove?

I was wondering if anyone has heard anything about the Sierra Titanium Zip Stove. It's been out of stock for close to half a year, and my emails go unanswered. Are they out of business? Busy? I'd really like to buy one as it fits in perfectly with the rest of my setup. Know of any other place it is available?

I did a Google "shopping" search for Sierra and zip and stove and nothing came up but a couple on ebay hits for the standard stove. At the site http://www.zzstove.com/mcart/ they say they will be in stock by fall of 2008, but obviously, they are not. I'd look for some "make it your self" similar stoves. I know at least one person who made one.