It took long enough, but version 1.4 of my Tally Arbiter software is released!
Here are some of the highlights:
First of all, the entire web interface has been rewritten to support the use of the Bootstrap framework. This makes it a lot easier to use, and it looks much better too! Huge shoutout to Matthijs (mg-1999) for taking the time to do this. The bulk of the Bootstrap rewrite is his work.

Secondly, Tally Arbiter can now monitor multiple ME’s on ATEM sources, whereas previous versions could only monitor ME 1. This is great if you have more busses that you need to track for on-air sources! If a source goes into preview or program on the ME’s you’ve selected to monitor, and a Device is associated with an address on that source, it will show up.

Third, the Blink(1) and GPO listener clients have been updated to support automatic attempts to reconnect to the Tally Arbiter server, if they start up and the server is offline. This will make it even easier to keep everything connected!
Also, support for Analog Way LiveCore devices has been added, thanks to Alberto (albertorighetto)! So if you have one of those devices, go check it out!
If you use the phone tally viewing page (a very convenient way to turn any phone or tablet into a tally light!), Tally Arbiter has two updates: a QR code has been added to the home page, making it easier for users to navigate to your Tally Arbiter server, especially if you’re running locally and you want to avoid typing in IP address information. Also, your device (if supported) will vibrate or pulse when the selected Device for tally goes into preview or program.

Lastly, there were a few bug fixes here and there to help with performance.
Here’s a video to show it in action!
You can get the latest source code at the Github repo: https://github.com/josephdadams/TallyArbiter