I have a FB page with fans in the tens of thousands. I wont show the page just yet but basically think of videos like those seen on Digg and Devour. That’s the kind of stuff we post.
If its safe you are promoting then don’t be too quick to promote. If we promote too much before there is a working system that people can easily install and try then you create interest only to have people brand it as vapourware and ignore it in future or at least be highly wary of it.