The latest of the PowerSystems server is out today. The S812 is the lowest end Power8 server, for up to 25 users. Alas, it is an either IBM i or AIX scenario as the server can only host one partition. It is in P05 tier and will be marketed to new small size customers looking for a robust server, and as a replacement for the smaller Power6 and Power7 servers.
You will find more information about this new PowerSystems server:
It will be interesting to learn how many of these IBM will sell.