I've moved this provisionally from the General area to Encryption ePO Managed for better attention. If anyone thinks there's a better spot I will move it again.
Until someone answers you, according to the product page no it doesn't support Windows 8.
Endpoint Encryption Full Disk and Files and Folders work now. The Host DLP portion will be supported with the forthcoming release 9.3. I believe it is scheduled to ship this quarter.
The main reason for asking was to use Endpoint Encryption so thats good enough for me.