Just wondering if there has been any news for a new a900 firmware.
No, not according to Sony eSupport.
Usually firmware updates are not announced in advance. So we will not know until they are available for download. Moreover, as far as I know, the A900 does not suffer from any defects that require a firmware such as the black 5D2 dots, 1D3 AF, or incompatibilities with some accessories. There are some areas that could be improved but Sony is under no obligation to do it, unless they want to be nice
M262 ZM 25/2.8 35/1.4 50/2 85/2
If it ain't broke why bother fixing it!!