Google is definitely no help on this subject...

As far as I know, you should soak them in water for a couple days, and then germinate them in a zip lock baggy with some peat moss in it. Make sure not to let it dry out, but also do not keep it to wet. Use a fungicide to keep the peat moss damp instead of water. But this is what I am guessing you do. This is the process with many types of palm seeds. It may be different with the sagos.

Some info at link below, Also some good info listed here.
http://www.plantapalm.com/vce/horticulture/seeds.htm

Here is a link that might be useful: Germinating Sago Seed