Dart on Pi - Update
Two separate items this week:
I built Dart SDK 1.11.1 stable for the Raspberry Pi, and you can download it here
version 1.11 : rpi-dart-sdk-1.11.1-stable.0.0.zip
In addition, I've been testing the rpi_gpio package interrupt support as part of my personal projects and it seems stable enough that I've published version 0.2.