Today I have also tested my A7V333 mainboard with the latest flashrom from svn; and see it could read an image (log in the attachement). It said that write and erase would still need to be tested; however the following message does not raise my confidence:
Changing lock bits failed at 0xb7305002! New value: 0xff.
Basically I would also be ready to test erase & write on this board though it would likely be a good idea to have the error/log messages checked first.