spantaleev
Is this project still supported?
It should work.. And there should still be some people who continue using it (including myself on some old projects).
However, no new development is being done on this library. And I'm not using Python for new web development projects anymore or investing time in Sijax.
That said, others have contributed stuff (including Python 3 support), so it should, theoretically, work. For those that need Sijax, it's likely usable. I personally, at this day and age, wouldn't start a new project using such kind of "frontend to backend" communication technology.
If you happen to start using it and do some fixes though, I'll happily merge them in.
In my opinion it's not a good choice for web development at the moment. If it works well for you, though, there's no reason to change. To each his own.