If you are using Docky 2.1 or later, there should be a sound notification when the timer expires. The version in the Maverick repositories is 2.0, so you will need to install Docky from the Development PPA for this feature.
Also, make sure you have system sounds enabled: System ➜ Preferences ➜ Sound and select the Ubuntu theme.
If you are using Docky 2.1 or later, there should be a sound notification when the timer expires. The version in the Maverick repositories is 2.0, so you will need to install Docky from the Development PPA for this feature.
Also, make sure you have system sounds enabled: System ➜ Preferences ➜ Sound and select the Ubuntu theme.