Awesome!
Question from those of us who use a lot of custom assessments: how will this impact the Python used for write-your-own-grader problems and custom javascript problems? I know most of the syntax will match just fine, but I also know that things like division, string checking, and rounding have some differences in Python 3 that could change grading in specific cases.
If we should start writing Python 3 versions of our assessments, it's better for us to know as early as possible.