The Kindle DX is sold out again... will only ship in 4-6 weeks

The Kindle DX is sold out again. Amazon says that this is due to heavy customer demand. It will continue shipping in 4-6 weeks (just a couple of weeks ago, the Kindle DX was sold out, but than it took Amazon only a couple of days to get more inventory). It is not clear whether this is because of heavy demand, indeed, or whether E Ink is having problem supplying the large 9.7-inch display...