Is Blackberry Playbook still supported?

I have this Blackberry Playbook tablet I'd like to try to get something working on. Maybe not to sell, just see it running on this tablet. I've gone through today's docs (which seem to be out of date) and managed to get the 2 csj files sent to me anyway. I got as far as trying to upload the Debug Token, at which point it fails with 'Error: 5022C232' (number being my device PIN). Since the docs are out of date, and this is not working, just wondering if it's a fad that has come and gone or what?...

Is Blackberry Playbook still supported?