Absolutely. When your meeting starts, you'll get an alert.
- Message All to send a Biba message to the other attendees that are using the Biba client.
- Running Late and choose the number of minutes.
Biba will show other people on the Roster how late you are running and will count down the minutes so others know when to expect you
When the time expires, Biba will pop up another alert so all you need to do is click Answer to join (or indicate that you are still running late).
Below is what the alert looks like on the mobile client; desktop provides the same options.