Weekly meetings
On Mondays, there are a series of weekly meetings at which everyone working in a specific area sits down to cover current status, future plans, and outstanding issues.
The meetings are generally between 4 and 10 people, and most people in the company attend 2 or 3 of them.
Anyone can come to any of these Monday meetings, so feel free to drop in if you're curious, or if you have an issue or question in that particular area.