As you know, BlackBerry 10 Pebble owners only really have Talk2Watch as their best option right now. That's not a bad thing as the app itself is pretty feature rich and has lots of goodies to come. On top of that the developer is slowly making APIs available for developers to make 'companion' apps to Talk2Watch. One app is being developed already and is currently available in beta in the Smartwatch Fans forums.
The app is called Watch2Watch and it allows you to send a message directly to a Pebble watch, provided you know the PIN ID which is the last four characters of the Bluetooth/serial number. You have to reply via the app but you can set canned messages to auto-reply from the Pebble watch.
I've been trying it out and I'm enjoying it so far. If you want to take part in the beta, head on over to the Smartwatch Fans forums and let the developer know. You can out the video above to see it in action.