Summary: The apostles gathered together on a certain day and received the ability to speak in many languages to the cosmopolitan population of Jerusalem. Questioned, their leader Paul speaks of Jesus' resurrection and His legacy, to repent and sin no more. Then they put it into practice, living communally and vibrantly.
Response: Throughout the last chapter, the thought in the back of my head had been, "now what?" But this is the "now what:" the people of God serving and growing their number. I don't think I've read Acts right after a Gospel before, so I've missed the continuity from Jesus to the Church, which is really cool so far.