It will not be possible to use the Telerik sts service as it isn't exposed for the customers. For now it is only internal for telerik sites.
With the new TeamPulse you will have build in STS service that you can configure to use external providers so you can have the same behavior as Telerik sts.
You will have the build-in functionality to log in with:
- existing TeamPulse credentials
- Live ID
It will look very similar to the Telerik STS except that you will log with TeamPulse user instead of Telerik user.
I hope this introduce a little more clarification. If you are more interested how this will work send a ticket so I can send you some of our draft guides.