300,000 3D printers by 2011?

Gartner analyst Pete Basiliere is quoted in Business Week as estimating that by 2011 there will be 300,000 3D printers "on the market". Not sure what's meant by that wording - 300,000 total sold, or 300,000 in year? To put it in perspective, the same story gives Terry Wohler's estimate that just over 3000 were sold in 2007. So a hundred-fold increase in just 4 years? I thought I was bullish on the technology.

By the way, I heard that one of the 3D printing companies was spreading rumors that Desktop Factory has "closed its doors". Well, I was down there today and walked through the door. It's true you do have to ring a bell, then they let you in, but they are working away and continuing to make good progress.