Also, if you can get a copy of the French magazine "Chasseur d'Images" (October Issue), it has a detailed review of the A900 (they are not typically Sony fans), along with the 5DII and so on.
And they gave the A900, 6 stars out of 5, for landscape use ! All other categories were scored as 5 stars.
Their additional verdict: At ISO 1600, the A900 has less noise than the Nikon D3. At ISO 6400, the D3 wins. Of course they did imatest/DXO tests etc., and printed the results at A2 size, while considering their scoring.
Bottomline, anyone intending to use the A900, better be prepared to invest in the latest crop of ultra-high-end lenses, to get the benefit of what it is capable of. Anything less, and prepare to be disappointed, since the sensor resolution is pretty merciless on even average lenses, especially when one moves to the FF borders.