Sure, you can pick up DDR 400 sticks here and there on the world wide web.
JEDEC, the standards committee for memory which has an acronym that doesn't stand for anything any more, has not yet validated DDR 400.
And the other major players in the industry, that is to say the usual suspects like Intel, Kingston et al, haven't validated it yet either.
Nevertheless, it probably will be validated and the specs are pretty well known and involve little rocket science.
The whole question has popped up again because of the introduction of the KT 400 chipset on Via. A representative today confirmed that DDR 400 is not officially supported on the chipset, but said that internal testing showed promising results so far.
Further, the International Pabster apparently ran a test on the QDI KT 400 board using DDR 400 samples and those seemed OK too.
We guess we'll have to wait for Intel, which has wrenched the flag of DDR promotion from Via and put up its own DDR balloon, to have its DRAM boffins give it the imprimatur.
Its DDR 333 Intel chipsets and mobos arrive any month now.
All we are saying, is give the piece a chance.