How do you engage your prospects and customers online?

Aside from the obvious social medias/communities, there has been a sharp rise in organisations using virtual events of all kinds from live podcasts to webinars and workshops to stay engaged with their audience. Are you using any of these means and why have you chosen that particular avenue? We're planning to host monthly / bi-weekly webinar sessions with guests in our sector to stay connected with potential customers. Mostly because it adds credibility / trust and it has great exposure at the moment.