You can install Windows 7 Beta on Acer Aspire One A0A110 with 8GB SSD. There is no need to vlite Windows 7 and you can ignore the warning that the recommended free space for installation is 8279MB. After installation, the free disk space left is 990MB.
As shown, the Windows Experience Index is only 2.0 due to the slow MLC SSD and graphics. The only score which is higher than Lenovo IdeaPad S10 is the memory even though both have 1GB RAM.