See my answer at
Is it okay to use Stack Overflow as the support forum for a product or project?Is it okay to use Stack Overflow as the support forum for a product or project?
One way is as you saw with Subsonic -- where they simply provide a single link to Stack Overflow among other links of places people can go to discuss Subsonic. I think that's an OK nudge and if you want to seed it with questions yourself, that's fine too.
So I think the community team will be pinging the Synergy folks to ensure they have multiple links of places people can go for support.