Sure, why not... Either, someone will submit a clean, safe patch and it will be reviewed and OKed and it will be checked in, or that's won't happen.
can I asume that this is a political change by Apple in this regard?
I tried to describe all of gcc development, past present and future, for all submitters... I don't think this is a change.
Isn't Apple no longer going to move ObjC++ to the trunk by itself and leaves this task to 3rd party volunteers?
Let me phrase it this way: We plan on doing it at some point in time, but someone else could beat us to getting it done. If you want to do the work, as always, we welcome the help, if you want to sit around and wait for someone else to do it, that is fine too. As to when this will be done, well, I cannot say, as I just don't know; this is why I said it will get done when it is done.
Has Ziemowit Laski been withdrawn from the project
No.
So please tell me/us, if we are on our own now doing the patch or if Ziemowit (or somebody else) will continue Apple's work.
See above.