Its not available to users yet but early staking S token is being built right now. Early staking will be available for testing in the next mockup. :) From there we will be dialing in that phase of the game then should be able to allow some early adopters access to that interface. It will likely be just checking balances and staking, perhaps some in game token production to experiment with. That in game token at first may be reset once we finalize amounts, ratios, etc and won't be meant as the real thing until we get a bit more built.
The staking of S to receive SNGL will likely be live at that point.