Hello Cameron Horton,
The forums on telerik.com are using the old implementation before the site was transferred to Sitefinity. So the features you see there are not available in the core of the CMS. However, for version 4.0 we are planning to rework the Forums module of Sitefinity and include a lot of requested features, sticky posts among them. We cannot give a date for the 4.0 release yet, but we are in the process of updating the product roadmap, so you'll have some more details soon.
As for sitefinity.com, yes, we also plan to migrate it to Sitefinity and we've started work on that, but cannot tell when exactly it is going to happen.
the Telerik team