[sinaluna]

Originally Posted by Tralala

What user is chosen to "post" this "welcome thread?"

The welcome thread is posted as the new member. This was a so that people can click to see their profile, send them PMs, give them reputation, etc. directly from the welcome thread.

As in the sample templates, you want to be sure that you clearly indicate that this is "Automatically Generated Message".

And, can it be modified to create a post in one pre-existing thread? I'd rather have all the welcomes in one thread, rather than lots and lots of individual threads.

Yes, this can be done. We had problems with some new users being skipped over and not getting "acknowledged" with the single thread. But if there a need for an option to post to a single thread instead of making a new thread, Ill look into the cleanest way to add this to the product.