By the way, we're also thinking about promotion of local groups on the official site. For example, if a visitor is from Poland he would see information about your local group in the header (still thinking how to implement it better way).
We also want to support it by sending a dedicated newsletter to our Polish subscribers. It could be something similar to our Moscow meetup announcement. Please see example here
(it was sent only to Russian subscribers only). So please email me appropriate text in Polish and English for it.
I'm writing to it here just to let other partners know that our team is ready to promote and support any initiative about meetups and building of local communities.