I did not find the time to add a ssdt, but with syngates dsdt msr dumper shows the following pstates:
pstates using mini 5.1 smbios: 8,13,16, 18
(core multiplier 18 geekbench 32bit tryout: 4250)
mbpro 9,2 smbios: 8,17
mbair 5.2 smbios 8,17
Mac mini 6.2 smbios: 8,17
(all core multiplier 17 geekbench 32bit 4000)
I skipped bluetooth and bought a Logitech K400r Keyboard with unifying controller.
The K400r unifying works oob, no kext needed. (Trackpad does two finger srolling, no gestures)
So bottom line no sleep, but this might be due to the system booting from usb...
All in all a decent low level machine and only about 250euros...