Okay, here are my $0.2.
User Registration: We have a user - registration module that we are going to release really soon now.
SCORM: No more updates from us at the moment, but ask Ernie directly.
Whiteboard: Too busy to look into it and make a plan.
Knoppix CD: We'd have to check and regenerate one, maybe even with a head checkout. And data (which we don't have). So if anyone wants to help us out here, send us a Postgres dumpfile of a head checkout that contains demo data and we'd incorporate it. English preferred (for Germans we have our own data).
On a seperate note, I think you are going in the right direction with your letter. Thanks for doing this!