A place to discuss questions relating to biblical questions that are not covered in posts on this blog is at Biblical Criticism & History Forum. Check it out. It’s a pretty comprehensive site. I sometimes drop in with a point of view or response to others.
I am sure there must be others around. I have not been to serious academic discussion lists for a while now but I think some of those also allow amateurs to join and occasionally raise questions.
There are also many blogs run by biblical scholars who would be happy to discuss a range of questions.
And there is of course Rene Salm’s Mythicist Papers but I suspect Rene would also appreciate comments and questions relating to the topics of his posts.
If you know of any sites of interest then do add them in the comments below.