August has a third tooth coming in. I thought it was his top right canine, but the internets tell me it is more likely his lateral incisor (the tooth between the canine and the front tooth). Although this is also (supposedly) slightly unusual because the top front teeth usually come in next.
The tooth is quite elusive so far and I have been unable to catch a glimpse of it. It is definitely there though.
More details as they develop.