It's still 2-3 weeks wait for the Pencil on the Apple Online store.
If an Air 3 with pencil support is targeted at a Spring release, I would have expected Apple to be on top of the Pencil supply issue by now.
I'm guessing that means:
1. No Pencil support for imminent Air 3
or
2. Air 3 is not imminent.
or
3. You'd very quickly be waiting in excess of 8 weeks for a Pencil. This would frustrate both Air 3 and iPad Pro purchasers. Seems very unwise.