I find it difficult to get people onboard for the Telecommunications Q&A:
http://area51.stackexchange.com/proposals/104688/telecommunications
The problem is mainly because most of my experts connections in this field don't know stackexchange or stackoverflow, and are confused by the registration process and the email verification step (need to receive 2 emails in some cases to follow the proposal or vote, which is weird).
It would be helpful to be able to attract users of other StackExchange sites who don't know Area51. Is there a way to address them?